-
K. Abe,
N. Abgrall,
H. Aihara,
T. Akiri,
J. B. Albert,
C. Andreopoulos,
S. Aoki,
A. Ariga,
T. Ariga,
S. Assylbekov, [......],
N. Yershov,
M. Yokoyama,
Ì T. Yuan,
A. Zalewska,
L. Zambelli,
K. Zaremba,
M. Ziembicki,
E. D. Zimmerman,
M. Zito,
and J. Zmuda
[show abstract]
[hide abstract]
ABSTRACT: T2K has performed the first measurement of \nu{\mu} inclusive charged current
interactions on carbon at neutrino energies of ~1 GeV where the measurement is
reported as a flux-averaged double differential cross section in muon momentum
and angle. The flux is predicted by the beam Monte Carlo and external data,
including the results from the NA61/SHINE experiment. The data used for this
measurement were taken in 2010 and 2011, with a total of 10.8 x 10^{19}
protons-on-target. The analysis is performed on 4485 inclusive charged current
interaction candidates selected in the most upstream fine-grained scintillator
detector of the near detector.
The flux-averaged total cross section is <\sigma_CC>_\phi =(6.91 +/- 0.13
(stat) +/- 0.84 (syst)) x10^{-39} cm^2/nucleon for a mean neutrino energy of
0.85 GeV.
02/2013;
-
Belle Collaboration,
I. Adachi,
K. Adamczyk,
H. Aihara,
K. Arinstein,
Y. Arita,
D. M. Asner,
T. Aso,
V. Aulchenko,
T. Aushev, [......],
L. M. Zhang,
Z. P. Zhang,
L. Zhao,
V. Zhilich,
P. Zhou,
V. Zhulanov,
T. Zivko,
A. Zupanc,
N. Zwahlen,
O. Zyukova
[show abstract]
[hide abstract]
ABSTRACT: We present a measurement of the time-dependent CP violation parameters in B0
-> pi+ pi- decays. The results are obtained from the final data sample
containing 772 million BBbar pairs collected at the Upsilon(4S) resonance with
the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the
CP violation parameters Acp = +0.33 +/- 0.06 (stat) +/- 0.03 (syst) and Scp =
-0.64 +/- 0.08 (stat) +/- 0.03 (syst), where Acp and Scp represent direct and
mixing-induced CP violation, respectively. From an isospin analysis including
results from other Belle measurements, we rule out 23.8 < phi2 < 66.8 degrees
at the 1 sigma level.
02/2013;
-
J. D. Parker,
K. Hattori,
H. Fujioka,
M. Harada,
S. Iwaki,
S. Kabuki,
Y. Kishimoto,
H. Kubo,
S. Kurosawa,
K. Miuchi,
T. Nagae,
H. Nishimura,
T. Oku,
T. Sawano,
T. Shinohara,
J. Suzuki,
A. Takada,
T. Tanimori, K. Ueno
[show abstract]
[hide abstract]
ABSTRACT: We have developed a prototype time-resolved neutron imaging detector
employing the micro-pixel chamber (muPIC), a micro-pattern gaseous detector,
coupled with a field programmable gate array-based data acquisition system for
applications in neutron radiography at high-intensity neutron sources. The
prototype system, with an active area of 10cm x 10cm and operated at a gas
pressure of 2 atm, measures both the energy deposition (via
time-over-threshold) and 3-dimensional track of each neutron-induced event,
allowing the reconstruction of the neutron interaction point with improved
accuracy. Using a simple position reconstruction algorithm, a spatial
resolution of 349 +/- 36 microns was achieved, with further improvement
expected. The detailed tracking allows strong rejection of background
gamma-rays, resulting in an effective gamma sensitivity of 10^-12 or less,
coupled with stable, robust neutron identification. The detector also features
a time resolution of 0.6 microseconds.
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 01/2013; 697:23-31. · 1.21 Impact Factor
-
D. Abbaneo,
G. Abbiendi,
M. Abbrescia,
S. Abdullin,
A. Abdulsalam,
B.S. Acharya,
D. Acosta,
J.G. Acosta,
A. Adair,
W. Adam, [......],
M.H. Zoeller,
O. Zorba,
P. Zotto,
W. Zou,
G. Zumerle,
M. Zupan,
A. Zuranski,
R. Zuyeuski,
M. Zvada,
P. Zych
[show abstract]
[hide abstract]
ABSTRACT: The Higgs boson was postulated nearly five decades ago within the framework of the standard model of particle physics and
has been the subject of numerous searches at accelerators around the world. Its discovery would verify the existence of a
complex scalar field thought to give mass to three of the carriers of the electroweak force—the W+, W–, and Z0 bosons—as well as to the fundamental quarks and leptons. The CMS Collaboration has observed, with a statistical significance
of five standard deviations, a new particle produced in proton-proton collisions at the Large Hadron Collider at CERN. The
evidence is strongest in the diphoton and four-lepton (electrons and/or muons) final states, which provide the best mass resolution
in the CMS detector. The probability of the observed signal being due to a random fluctuation of the background is about 1
in 3 × 106. The new particle is a boson with spin not equal to 1 and has a mass of about 1.25 giga–electron volts. Although its measured
properties are, within the uncertainties of the present data, consistent with those expected of the Higgs boson, more data
are needed to elucidate the precise nature of the new particle.
Science 12/2012; 338(6114):1569-1575. · 31.20 Impact Factor
-
I. Adachi,
K. Adamczyk,
H. Aihara,
K. Arinstein,
Y. Arita,
D. M. Asner,
T. Aso,
V. Aulchenko,
T. Aushev,
T. Aziz, [......],
L. M. Zhang,
Z. P. Zhang,
L. Zhao,
V. Zhilich,
P. Zhou,
V. Zhulanov,
T. Zivko,
A. Zupanc,
N. Zwahlen,
O. Zyukova
[show abstract]
[hide abstract]
ABSTRACT: We present a study of the branching fraction of the decay B^0 -> rho^0 rho^0
and the fraction of longitudinally polarized \rho^0 mesons in this decay. The
results are obtained from the final data sample containing $772 \times 10^{6}$
$B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle
detector at the KEKB asymmetric-energy e^+e^- collider. We find $166 \pm 59$
B^0 -> rho^0 rho^0 events, corresponding to a branching fraction of ${\cal
B}(B^0 -> rho^0 rho^0) = (1.02\pm 0.30 (\rm stat) \pm 0.22 (\rm syst))\times
10^{-6} $ with a longitudinally polarization fraction $f_L =
0.21^{+0.18}_{-0.22} (\rm stat) \pm 0.11 (\rm syst)$. The branching fraction's
upper limit is ${\cal B}(B^0 -> rho^0 rho^0) < 1.5 \times 10^{-6}$ at 90%
confidence level. We use the longitudinal polarization fraction to determine
the Cabibbo-Kobayashi-Maskawa matrix angle $\phi_2 = (91.0 \pm 7.2)^{\circ}$
through an isospin analysis in the $B\to\rho\rho$ system. We furthermore obtain
${\cal B}(B^0 -> rho^0 f_0) \times {\cal B}(f_0 -> \pi^+\pi^-) = (0.86 \pm 0.27
(\rm stat) \pm 0.15 (\rm syst))\times 10^{-6}$, corresponding to $149 \pm 49$
$B^0 -> rho^0 f_0$ events with a significance of 3.0 standard deviations and
upper limits at 90% confidence level on the (product) branching fractions for
possible decays with the same final state, ${\cal B}(B^0 -> pi^+\pi^-pi^+\pi^-)
< 11.7 \times 10^{-6} $, ${\cal B}(B^0 -> rho^0 pi^+\pi^-) < 12.2 \times
10^{-6}$, ${\cal B}(B^0 -> f_0 pi^+\pi^-) \times {\cal B}(f_0->\pi^+\pi^-) <
3.1 \times 10^{-6}$ and ${\cal B}(B^0 -> f_0 f_0) \times {\cal
B}(f_0->\pi^+\pi^-)^{2} < 0.2 \times 10^{-6}$.
12/2012;
-
Collaboration,
K. Abe,
N. Abgrall,
H. Aihara,
T. Akiri,
J. B. Albert,
C. Andreopoulos,
S. Aoki,
A. Ariga,
T. Ariga, [......],
N. Yershov,
M. Yokoyama,
T. Yuan,
A. Zalewska,
L. Zambelli,
K. Zaremba,
M. Ziembicki,
E. D. Zimmerman,
M. Zito,
J. Zmuda
[show abstract]
[hide abstract]
ABSTRACT: The Tokai-to-Kamioka (T2K) experiment studies neutrino oscillations using an
off-axis muon neutrino beam with a peak energy of about 0.6 GeV that originates
at the J-PARC accelerator facility. Interactions of the neutrinos are observed
at near detectors placed at 280 m from the production target and at the far
detector -- Super-Kamiokande (SK) -- located 295 km away. The flux prediction
is an essential part of the successful prediction of neutrino interaction rates
at the T2K detectors and is an important input to T2K neutrino oscillation and
cross section measurements. A FLUKA and GEANT3 based simulation models the
physical processes involved in the neutrino production, from the interaction of
primary beam protons in the T2K target, to the decay of hadrons and muons that
produce neutrinos. The simulation uses proton beam monitor measurements as
inputs. The modeling of hadronic interactions is re-weighted using thin target
hadron production data, including recent charged pion and kaon measurements
from the NA61/SHINE experiment. For the first T2K analyses the uncertainties on
the flux prediction are evaluated to be below 15% near the flux peak. The
uncertainty on the ratio of the flux predictions at the far and near detectors
is less than 2% near the flux peak.
11/2012;
-
S. Iwaki,
S. Kurosawa,
S. Komura,
A. Takada,
T. Sawano,
T. Tanimori,
Y. Sato,
K. Taniue, Y. Kishimoto,
H. Kubo,
K. Nakamura,
K. Miuchi,
T. Mizumoto,
S. Kabuki,
N. Higashi,
Y. Matsuoka,
J. D. Parker,
K. Ueno
-
I. Adachi,
K. Adamczyk,
H. Aihara,
K. Arinstein,
Y. Arita,
D. M. Asner,
T. Aso,
V. Aulchenko,
T. Aushev,
T. Aziz, [......],
L. M. Zhang,
Z. P. Zhang,
L. Zhao,
V. Zhilich,
P. Zhou,
V. Zhulanov,
T. Zivko,
A. Zupanc,
N. Zwahlen,
O. Zyukova
[show abstract]
[hide abstract]
ABSTRACT: We report preliminary results on the analysis of the three-body Y(10860)=> B
barB pi, Y(10860) => (B barB* + c.c.) pi and Y(10860)=> B* barB* pi decays
including an observation of the Y(10860)=> Zb(10610)+- pi-+ => [B barB*+c.c]+-
pi-+ and Y(10860)=> Zb(10650)+- pi-+ => [B* barB*]+- pi-+ decays as
intermediate channels. We measure branching fractions of the three-body decays
to be Br(Y(10860)=> [B barB*+c.c.]+- pi-+)=(28.3+-2.9+-4.6)x10^{-3} and
Br(Y(10860)=> [B* barB*]+- pi-+)=(14.1+-1.9+-2.4)x10^{-3} and set 90% C.L.
upper limit Br(Y(10860)=> [B barB]+- pi-+)<4.0x10^{-3}. We also report results
on the amplitude analysis of the three-body Y(10860)=>Y(nS)pi+pi-, n=1,2,3
decays and the analysis of the internal structure of the three-body
Y(10860)=>hb(mP)pi+pi-, m=1,2 decays. The results are based on a 121.4 1/fb
data sample collected with the Belle detector at a center-of-mass energy near
the Y(10860).
09/2012;
-
[show abstract]
[hide abstract]
ABSTRACT: All-optical pump-probe detection of magnetization precession has been
performed for ferromagnetic EuO thin films at 10 K. We demonstrate that the
circularly-polarized light can be used to control the magnetization precession
on an ultrafast time scale. This takes place within the 100 fs duration of a
single laser pulse, through combined contribution from two nonthermal
photomagnetic effects, i.e., enhancement of the magnetization and an inverse
Faraday effect. From the magnetic field dependences of the frequency and the
Gilbert damping parameter, the intrinsic Gilbert damping coefficient is
evaluated to be {\alpha} \approx 3\times10^-3.
07/2012;
-
C. Regis,
K. Abe,
Y. Hayato,
K. Iyogi,
J. Kameda,
Y. Koshio,
Ll. Marti,
M. Miura,
S. Moriyama,
M. Nakahata, [......],
M. Yokoyama,
K. Martens,
M. R. Vagins,
S. Chen,
H. Sui,
Z. Yang,
H. Zhang,
K. Connolly,
M. Dziomba,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: We have searched for proton decay via p→μ+K0 using data from a 91.7 kiloton·year exposure of Super-Kamiokande- I, a 49.2 kiloton·year exposure of Super-Kamiokande II, and a 31.9 kiloton·year exposure of Super-Kamiokande III. The number of candidate events in the data was consistent with the atmospheric neutrino background expectation and no evidence for proton decay in this mode was found. We set a partial lifetime lower limit of 1.6×1033 years at the 90% confidence level.
Phys. Rev. D. 07/2012; 86(1).
-
I. Adachi,
K. Adamczyk,
H. Aihara,
K. Arinstein,
Y. Arita,
D. M. Asner,
T. Aso,
V. Aulchenko,
T. Aushev,
T. Aziz, [......],
L. M. Zhang,
Z. P. Zhang,
L. Zhao,
V. Zhilich,
P. Zhou,
V. Zhulanov,
T. Zivko,
A. Zupanc,
N. Zwahlen,
O. Zyukova
[show abstract]
[hide abstract]
ABSTRACT: We report the first observation of Y(5S) -> Y(1,2S) pi0 pi0 decays. Evidence
for the Zb0(10610) with 4.9sigma significance is found in a Dalitz plot
analysis of Y(5S) -> Y(2S) pi0 pi0 decays. The results are obtained with a
121.4 fb^-1 data sample collected with the Belle detector at the Y(5S)
resonance at the KEKB asymmetric-energy e+e- collider.
07/2012;
-
H. Nishino,
K. Abe,
Y. Hayato,
T. Iida,
M. Ikeda,
J. Kameda,
Y. Koshio,
M. Miura,
S. Moriyama,
M. Nakahata, [......],
M. R. Vagins,
S. Chen,
Y. Heng,
J. Liu,
Z. Yang,
H. Zhang,
D. Kielczewska,
K. Connolly,
E. Thrane,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: Searches for a nucleon decay into a charged antilepton (e+ or μ+) plus a light meson (π0, π-, η, ρ0, ρ-, ω) were performed using the Super-Kamiokande I and II data. Twelve nucleon decay modes were searched for. The total exposure is 140.9 kiloton·years, which includes a 91.7 kiloton·year exposure (1489.2 live days) of Super-Kamiokande-I and a 49.2 kiloton·year exposure (798.6 live days) of Super-Kamiokande II. The number of candidate events in the data was consistent with the atmospheric neutrino background expectation. No significant evidence for a nucleon decay was observed in the data. Thus, lower limits on the nucleon partial lifetime at 90% confidence level were obtained. The limits range from 3.6×1031 to 8.2×1033 years, depending on the decay modes.
Phys. Rev. D. 06/2012; 85(11).
-
The Super-Kamiokande Collaboration: C. Regis,
K. Abe,
Y. Hayato,
K. Iyogi,
J. Kameda,
Y. Koshio,
Ll. Marti,
M. Miura,
S. Moriyama,
M. Nakahata, [......],
M. Yokoyama,
K. Martens,
M. R. Vagins,
S. Chen,
H. Sui,
Z. Yang,
H. Zhang,
K. Connolly,
M. Dziomba,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: We have searched for proton into muon plus neutral kaon using data from a
91.7 kiloton-year exposure of Super-Kamiokande-I, a 49.2 kiloton-year exposure
of Super-Kamiokande-II, and a 31.9 kiloton-year exposure of
Super-Kamiokande-III. The number of candidate events in the data was consistent
with the atmospheric neutrino background expectation and no evidence for proton
decay in this mode was found. We set a partial lifetime lower limit of
1.6x10^33 years at the 90% confidence level.
05/2012;
-
[show abstract]
[hide abstract]
ABSTRACT: We have investigated the ultrafast spin dynamics in EuO thin films by
time-resolved Faraday rotation spectroscopy. The photoinduced magnetization is
found to be increased in a transient manner, accompanied with subsequent
demagnetization. The dynamical magnetization enhancement showed a maximum
slightly below the Curie temperature with prolonged tails toward both lower and
higher temperatures and dominates the demagnetization counterpart at 55 K. The
magnetization enhancement component decays in ~1 ns. The realization of the
transient collective ordering is attributable to the enhancement of the f-d
exchange interaction.
05/2012;
-
The CMS Collaboration,
V. Khachatryan,
A. M. Sirunyan,
A. Tumasyan,
W. Adam,
T. Bergauer,
M. Dragicevic,
J. Erö,
C. Fabjan,
M. Friedl, [......],
J. Leonard,
D. Lomidze,
R. Loveless,
A. Mohapatra,
G. Polese,
D. Reeder,
A. Savin,
W. H. Smith,
J. Swanson,
M. Weinberg
[show abstract]
[hide abstract]
ABSTRACT: A measurement of the underlying activity in scattering processes with p
T
scale in the GeV region is performed in proton–proton collisions at Ös = 0.9\sqrt{s} = 0.9TeV, using data collected by the CMS experiment at the LHC. Charged particle production is studied with reference to the
direction of a leading object, either a charged particle or a set of charged particles forming a jet. Predictions of several
QCD-inspired models as implemented in PYTHIA are compared, after full detector simulation, to the data. The models generally
predict too little production of charged particles with pseudorapidity |η|<2, p
T
>0.5 GeV/c, and azimuthal direction transverse to that of the leading object.
European Physical Journal C 04/2012; 70(3):555-572. · 3.63 Impact Factor
-
CMS Collaboration,
V. Khachatryan,
A. M. Sirunyan,
A. Tumasyan,
W. Adam,
T. Bergauer,
M. Dragicevic,
J. Erö,
M. Friedl,
R. Frühwirth, [......],
C. Lazaridis,
J. Leonard,
D. Lomidze,
R. Loveless,
A. Mohapatra,
D. Reeder,
A. Savin,
W. H. Smith,
J. Swanson,
M. Weinberg
[show abstract]
[hide abstract]
ABSTRACT: Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton
collisions at Ös = 0.9\sqrt{s} = 0.9 and 2.36 TeV. The data were collected with the CMS detector during the LHC commissioning in December 2009. For non-single-diffractive
interactions, the average charged-hadron transverse momentum is measured to be 0.46 ± 0.01 (stat.) ± 0.01 (syst.) GeV/c at 0.9 TeV and 0.50 ± 0.01 (stat.) ± 0.01 (syst.) GeV/c at 2.36 TeV, for pseudorapidities between --2.4 and +2.4. At these energies, the measured pseudorapidity densities in the
central region, dN
ch/dη||η|<0.5, are 3:48 ± 0:02 (stat.) ± 0.13 (syst.) and 4:47 ± 0:04 (stat.) ± 0.16 (syst.), respectively. The results at 0.9 TeV
are in agreement with previous measurements and confirm the expectation of near equal hadron production in [`(p)] p \overline p p and pp collisions. The results at 2.36 TeV represent the highest-energy measurements at a particle collider to date.
KeywordsHadron-Hadron Scattering
Journal of High Energy Physics 04/2012; 2010(2):1-35. · 5.83 Impact Factor
-
The CMS Collaboration,
V. Khachatryan,
A. M. Sirunyan,
A. Tumasyan,
W. Adam,
T. Bergauer,
M. Dragicevic,
J. Erö,
C. Fabjan,
M. Friedl, [......],
J. Leonard,
D. Lomidze,
R. Loveless,
A. Mohapatra,
G. Polese,
D. Reeder,
A. Savin,
W. H. Smith,
J. Swanson,
M. Weinberg
[show abstract]
[hide abstract]
ABSTRACT: The first LHC pp collisions at centre-of-mass energies of 0.9 and 2.36TeV were recorded by the CMS detector in December 2009.
The trajectories of charged particles produced in the collisions were reconstructed using the all-silicon Tracker and their
momenta were measured in the 3.8T axial magnetic field. Results from the Tracker commissioning are presented including studies
of timing, efficiency, signal-to-noise, resolution, and ionization energy. Reconstructed tracks are used to benchmark the
performance in terms of track and vertex resolutions, reconstruction of decays, estimation of ionization energy loss, as well
as identification of photon conversions, nuclear interactions, and heavy-flavour decays.
European Physical Journal C 04/2012; 70(4):1165-1192. · 3.63 Impact Factor
-
Super-Kamiokande Collaboration: H. Nishino,
K. Abe,
Y. Hayato,
T. Iida,
M. Ikeda,
J. Kameda,
Y. Koshio,
M. Miura,
S. Moriyama,
M. Nakahata, [......],
M. R. Vagins,
S. Chen,
Y. Heng,
J. Liu,
Z. Yang,
H. Zhang,
D. Kielczewska,
K. Connolly,
E. Thrane,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: Searches for a nucleon decay into a charged anti-lepton (e^+ or {\mu}^+) plus
a light meson ({\pi}^0, {\pi}^-, {\eta}, {\rho}^0, {\rho}^-, {\omega}) were
performed using the Super-Kamiokande I and II data. Twelve nucleon decay modes
were searched for. The total exposure is 140.9 kiloton \cdot years, which
includes a 91.7 kiloton \cdot year exposure (1489.2 live days) of
Super-Kamiokande-I and a 49.2 kiloton \cdot year exposure (798.6 live days) of
Super-Kamiokande-II. The number of candidate events in the data was consistent
with the atmospheric neutrino background expectation. No significant evidence
for a nucleon decay was observed in the data. Thus, lower limits on the nucleon
partial lifetime at 90% confidence level were obtained. The limits range from
3.6 \times 10^31 to 8.2 \times 10^33 years, depending on the decay modes.
03/2012;
-
[show abstract]
[hide abstract]
ABSTRACT: Tolerance to morphine analgesia following repeated administration disturbs the continuation of opioid therapy for severe pain. Emerging evidence suggests that the development of morphine tolerance may be antagonized by painful stimuli. To clarify the detailed mechanisms of these phenomena, we examined the effects of several pain stimuli on morphine-induced tolerance. Subcutaneous (s.c.) injection of morphine (10 mg/kg) produced an analgesic effect, which was evaluated by tail-pinch test. Morphine-induced analgesia was diminished by repeated administration of morphine (10 mg/kg, s.c.) once a day for 5 days, demonstrating the development of tolerance. Morphine analgesic tolerance was suppressed by nerve injury-induced neuropathic pain and formalin- or carrageenan-induced inflammatory pain. Tolerance to serum corticosterone elevation by morphine (10 mg/kg), which was evaluated by fluorometric assay, was also suppressed by formalin-induced inflammatory pain. Moreover, morphine analgesia induced by intracerebroventricular (10 nmol) or intrathecal (5 nmol) injection was diminished by repeated administration of morphine s.c., and this was also suppressed by carrageenan-induced inflammatory pain. These results suggest that morphine tolerance is inhibited by several pain stimuli, including neuropathic and inflammatory pain, through central mechanisms.
Drug discoveries & therapeutics. 02/2012; 6(1):31-7.
-
K Ueno,
T Mizumoto,
K Hattori,
N Higashi,
S Iwaki,
S Kabuki,
Y Kishimoto,
S Komura,
H Kubo,
S Kurosawa,
Y Matsuoka,
K Miuchi,
K Nakamura,
H Nishimura,
J Parker,
Y Sato,
T Sawano,
A Takada,
T Tanimori
[show abstract]
[hide abstract]
ABSTRACT: We have developed an Electron-Tracking Compton Camera (ETCC) for use onboard a balloon to observe sub-MeV/MeV gamma rays from celestial objects. The ETCC is constructed with a three dimensional gaseous tracker for recoil electrons from Compton scattering, and GSO:Ce pixel scintillator arrays as absorber of the Compton-scattered gamma-ray. By using the ETCC, we can reconstruct the energy and direction of individual gamma rays. We have developed a prototype ETCC with a (30 cm)3 TPC, and tested its performance in the range of 356 - 835 keV in the laboratory. As the result, we succeeded in taking images of gamma ray sources and determined a detection efficiency of 9.0 × 10−6 and an effective area of 8.0 × 10−3 cm2 at 662 keV for the prototype ETCC. Furthermore, we developed a new power saving readout circuit for the scintillators that achieves the electric power consumption of 0.41 W/channel, an energy dynamic range of 81 - 1333 keV, and an energy resolution of 10.3% at full width at half maximum at 662 keV.
Journal of Instrumentation 01/2012; 7(01):C01088. · 1.87 Impact Factor
