Marcin Strojecki

• Doctor of Philosophy
• Adjunct/PhD at Polish Academy of Sciences

Automated sorption balances are widely used for characterizing the interaction of water vapor with hygroscopic materials. These instruments provide an efficient way to collect sorption isotherm data and kinetic data. A typical method for defining equilibrium after a step change in relative humidity (RH) is using a particular threshold value for the...

Mechanical properties—modulus of elasticity and strain at break, water vapour sorption, and hygroscopic expansion of selected egg tempera and distemper paints were determined as a function of relative humidity (RH) filling in this way a critical gap in the knowledge required for the analysis of fracturing processes in paintings. The experimental wo...

A comprehensive model of indoor particle deposition onto surfaces of historic interiors was developed. The model takes into account the most important deposition processes observed in historic buildings: Brownian and turbulent diffusion, gravitational settling, turbophoresis, and thermophoresis. The developed model is expressed as a function of imp...

Warehouses are big architectonical structures mostly made of spruce wood and utilized as storage buildings principally by food traders in Northern Countries. Trondheim’s warehouses currently observable along the river Nidelva, date back between the 17th and half of the 19th century were mostly used to stock and process fish. Therefore, where the fo...

One of the main issues of the international research project SyMBoL - Sustainable Management of Heritage Buildings in a Long-term perspective, is the evaluation of wood mechanical properties. Particularly, pine wood is tested being the main building materials of medieval Norwegian stave churches. Experiments are aimed to assess variations in mechan...

Surface treatments can modify the materials behavior toward water sorption phenomena. The Guggenheim‐Andersen‐de Boer (GAB) sorption equation, already used in the past to study various wood species, is here proposed to investigate the sorption behavior of pine wood samples treated with different sealing material. Particularly, the paper aims to exp...

These technical guidelines are designed for conservation scientists and conservators actively seeking to deploy acoustic emission (AE) monitoring as a means of tracing physical change in cultural heritage objects. Aiming to provide comprehensive information about AE hardware and sensors, measurement protocols, and methods of data analysis, this pub...

Acoustic emission is a well-known noninvasive methodology for the study of defects in materials but still rarely applied in the field of cultural heritage diagnostic. How alteration products and degradation processes affect the acoustic emission signal still is an open issue. The proposed study concerns the utilization of such techniques to investi...

Surface treatments can modify the materials behavior toward water sorption phenomena and the GAB equation is here proposed to study pine wood samples treated with difference sealing materials limiting in different ways the access and release of water moisture. Particularly, the modification of the kGAB, CGAB, Vads and SGAB parameters as a function...

Energy consumption modelling in historical buildings has been performed to estimate the cost of maintaining the desired indoor microclimate, with the emphasis put on the humidity stabilization for collections care. The chosen buildings represented various types of construction and interactions with the outside conditions. Performance of three metho...

The soiling of valuable surfaces indoors depends on particle size, concentration and chemical composition, air and surface temperature, air velocity and surface roughness. A growing body of research has pointed towards fine particles (size range 0.1–1 μm) as having particularly adverse soiling effect due to efficient penetration of gaps into the bu...

HERIe is a web-based decision-supporting software tool to facilitate the management of collection environments by precise assessment of climate-induced risk of physical damage to vulnerable objects. The software translates the relative humidity and temperature data recorded in the environment of the analysed object into a strain history experienced...

This experimental program, implemented by the Managing Collection Environment Initiative at the Getty Conservation Institute, has provided data about the response of historic objects to changes in relative humidity (RH). Alongside other less sensitive documentation techniques (visual observation, physical measurements, photography, and 3D scanning)...

Schemes for internal ro-vibrational cooling in Yb2 and Cd2, as well as ¹⁷¹Yb Bohm's spin-1/2 particle version of the Einstein‒Podolsky‒Rosen experiment based on photo-dissociation of (¹⁷¹Yb)2 are presented. The schemes are based on exploration of the rotational and vibrational energy structures using both theoretical and experimental approaches.

A critical review of experimental studies and ab initio calculations of the low-lying ungerade excited and ground state interatomic potentials of Cd2 van der Waals dimer is presented. Consistency as well as discrepancies between experimental results and ab initio calculations are probed. In order to obtain better agreement with existing experimenta...

The microclimatic monitoring of the historic church of Mogiła Abbey (Kraków, Poland) was carried out to study the impact of the environmental parameters on the organic and hygroscopic artworks. Specific indexes were proposed to objectively assess the quality of time series of temperature (T), relative humidity (RH), and carbon dioxide (CO2) before...

Acoustic emission (AE) is a method with great potential for monitoring the development of micro-damage in objects exposed to the potentially harmful conditions of temperature (T) and relative humidity (RH). It allows one to directly record damage growth while changes remain invisible to those caring for the collection, as opposed to monitoring and...

Results of new all-electron ab initio calculations and revisit of experimental studies of the interatomic potentials of lower-lying ungerade excited and ground electronic energy states of the Hg2 and Cd2 van der Waals complexes are used as probes of discrepancies between theory and experiment. From simulations of the previously and presently measur...

The particle concentrations outside and inside two historical churches were monitored for at least ten months. The highest levels of outdoor concentrations were recorded in winter. This was caused by high levels of particle emissions from the burning of predominantly solid fuel for domestic heating in premises around the two churches monitored. The...

Particle sources and deposition inside two historical churches, differing in size and construction were examined. The particle concentrations indoors and outdoors were monitored for at least 10 months. The air exchange rate (AER) was determined by fitting an exponential decay curve to the recorded concentration of indoor-generated CO2. The two-para...

Scots pine (Pinus sylvestris L.) was subjected to relative humidity (RH) changes, and the dynamic strain field on the surface and in the bulk wood was monitored by digital speckle pattern interferometry and X-ray computed microtomography assisted by digital volume correlation. If a freely shrinking specimen was subjected to an RH decrement, earlywo...

New ab initio and revisited experimental studies of the interatomic potentials of ungerade excited and ground electronic energy states of the heavy van der Waals (vdW) dimer Hg2 were used as a "test-bed" for theory-to-experiment comparisons. Representations of the lowest excited- and ground-state Hg2 interatomic potentials were proposed, by using a...

The on-site monitoring of acoustic emission (AE) has allowed the direct tracing of climate-induced crack propagation in an eighteenth-century wardrobe displayed in the Gallery of Decorative Art in the National Museum in Krakow, Poland. The anti-correlation measuring scheme and frequency filtering allowed very low levels of physical damage to the wa...

Excitation spectra of CdNe, CdAr and CdKr complexes were recorded using the B31(53P1) ← X10+(51S0) bound ← bound and free ← bound transitions. A simulation of the dissociation continua formed by the free ← bound transitions in CdNe and CdAr permitted a determination of the repulsive part of the B31-state potential above the dissociation limit. The...

Timber elements are major structural and architectural components in historic buildings and at the same time belong to the category of materials vulnerable to degradation. The recovery of 150-year old timber beams from a roof of a historic building made possible the non-destructive investigation of their response to cyclic loading. The experimental...

We present recent progress in the implementation of experimental realization of a loophole-free test of Bell inequalities for entangled 111 Cd atoms. The experimental approach is a modified version of the proposal of FRY and co-workers (Phys. Rev. A 52(6), 1995, p. 4381) for the re-alization of Bohm's 1/2-spin particle version of the Einstein–Podol...

Acoustic emission (AE) technique has recently become an important non-destructive tool to gain insight into the evolution of damage in materials. It is widely used as a laboratory method in material science and civil engineering. However, it has not been applied sufficiently in the field of cultural heritage, mainly due to the great variety of hist...

The method of supersonic free-jet expansion beam combined with techniques of laser spectroscopy was used in an investigation of vibronic and isotopic structures in the D¹0(u)⁺ (6¹S₀) and F³1(u)(6³P₂) electronic energy Rydberg states of Cd₂. Laser-induced fluorescence excitation spectra recorded using the D¹0(u)⁺ ← X¹0(g)⁺(5¹S₀) and F³1(u) ← X¹0(g)⁺...

Isotopic and rotational structures of the (υ′,υ″) = (13,5), (14,5), (16,5) and (υ′,υ″) = (0,1)–(6,1) vibrational bands of the E3Σ+←A3Π0+E3Σ+←A3Π0+ and E3Σ+ ← B3Σ1+ transitions in CdAr, respectively, as well as the (υ′,υ″) = (21,9) of the E3Σ+←A3Π0+E3Σ+←A3Π0+ transition in CdKr were investigated using free-jet expansion beam and laser excitation. An...

Laser-induced fluorescence excitation and dispersed emission spectra of Cd2 recorded using the c31u(53P2)←X10g+ and b30u+(53P1)→X10g+ transitions, respectively are reported. In the excitation to the c31u state, red-shaded vibrational components of several υ′ ← υ″ = 0, 1, 2, 3 progressions and Δυ = 0,1 sequences were identified. In the emission from...

Laser-induced fluorescence dispersed emission spectra recorded using the C1Π1(υ′)→X1Σ0+ transition in ZnKr, ZnAr and ZnNe complexes are reported. The complexes were produced in a continuous free-jet beam crossed with a pulsed dye-laser beam. The spectra were recorded using a spectrograph equipped with CCD camera. The recorded profiles displayed cha...

Laser-induced fluorescence excitation spectra of MeRg (Me = Zn, Cd; Rg = He, Ne, Ar, Kr, Xe) complexes were recorded using the D1 ← X1 free ← bound transition. The complexes were produced in their ground state in a free-jet expansion beam and excited with a dye-laser beam directly to the excited state. Analysis of free ← bound unstructured profiles...

Laser-induced fluorescence excitation spectra of CdRg (Rg=He, Ne, Xe) complexes were recorded at the D1Σ0+←X1Σ0+ bound←bound and free←bound transitions. In case of CdXe, analysis of the recorded profiles resulted in determination of the D1Σ0+-state potential energy curve and ground-state dissociation energy. In case of CdHe and CdNe, analysis of th...

Laser-induced fluorescence excitation and dispersed fluorescence spectra of a cadmium dimer recorded using the B11u ↔ X10+g transition are reported. In the excitation, well-resolved isotopic structure of several υ' ← υ'' = 0 vibrational components (υ' from 34 to 40) as well as a free ← bound unstructured band was recorded. The B11u-state interatomi...

Laser-induced fluorescence excitation spectra observed using the D1Σ0+←X1Σ0+ transition were used to determine the D1Σ0+-state potential in ZnNe, ZnAr and ZnKr. The complexes were produced in a free-jet expansion beam and excited with a dye-laser beam from the ground to the excited state. Analysis of the unstructured free←bound profiles yielded inf...

Dynamic optogalvanic signals relevant to Kr atomic transitions in 427-451 nm range are recorded for calibration purposes as functions of the discharge current and laser power in a Kr/Fe hollow cathode lamp. The differences between the resonant and non-resonant dynamic optogalvanic signals are discussed.

Rotational profiles of the 228Cd 2 isotopomer recorded in the ( υ', υ″) = (26, 0), (27, 0), (42, 0), (45, 0), (46, 0), (48, 0) vibrational bands of the A0u+←X0g+ transition were analysed. As a result, the Bυ=26'=0.0311(5)cm, Bυ=27'=0.0309(5)cm, Bυ=42'=0.0279(5)cm, Bυ=45'=0.0278(5)cm, Bυ=46'=0.0275(5)cm and Bυ=48'=0.0272(5)cm excited- as well as the...

A method of supersonic free-jet expansion beam combined with techniques of laser spectroscopy was used in investigation of vibrational and rotational structures in the 10u+(51P1) and 11u(51P1) electronic energy states of Cd2. Laser induced fluorescence (LIF) excitation and dispersed fluorescence spectra recorded at the 10u+-X10g+ and 11u-X10g+ tran...

A method of supersonic free-jet expansion beam combined with techniques of laser spectroscopy was used in investigation of vibrational and rotational structures in the 10(u)(+)(5(1)P(1)) and (1)l(u)(5(1)P(1)) electronic energy states of Cd-2. Laser induced fluorescence (LIF) excitation and dispersed fluorescence spectra recorded at the 10(u)(+) - X...

Analysis of a first-time recorded rotational structure of the υ′=45←υ″=0υ′=45←υ″=0 band of the 10u+(51P1)←X10g+ transition in 228Cd2 is presented. In the interpretation, an influence of a nuclear spin intensity alternation and rotational levels symmetry properties are taken into account. From the analysis, the Bυ″=0=0.0206±0.0005cm-1 and Bυ′=45=0.0...

The -state potential parameters of Zn2 were determined from vibrational progressions recorded in an excitation spectrum. The molecules were produced in a free-jet supersonic beam using two different carriers, Ar and Kr, and were excited from the ground state directly to the state using a dye-laser. Analysis of the recorded vibrational progressions...

A method of supersonic beam combined with techniques of laser spectroscopy and simulations of spectra were employed to study interatomic potentials of Cd₂ and Zn₂ molecules. Total laser induced fluorescence was recorded after an excitation of Cd₂ using laser radiation in the range of 2200–2260 angstrom. The observed...

A method of supersonic beam combined with techniques of laser spectroscopy and simulations of spectra were employed to study interatomic potentials of Cd2 and Zn2 molecules. Total laser induced fluorescence was recorded after an excitation of Cd2 using laser radiation in the range of 2200-2260 Å. The observed structures are interpreted as due to th...

The supersonic beam method combined with techniques of laser spectroscopy has been applied to determine the repulsive wall of the D10+(1Σ+) excited-state potential of CdAr and CdKr molecules. The molecules were produced in a continuous supersonic-expansion beam and excited with a dye-laser beam directly from the X10+(1Σ+) to the excited state. Anal...