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1
Content available Radionuklidy kosmogeniczne w meteorycie Antonin
100%
Tymiński Z.
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tom 14
192-199
EN
The Antonin meteorite fell on July 15, 2021 in Wielkopolska Voivodeship. Its fall was recorded by fireball camera network and the meteorite specimen was recovered soon after, during a dedicated search expedition. Main mass of Antonin was provided for scientific research relatively quickly after recovery, thanks to which the studies of cosmogenic radionuclide concentrations were carried out in the g spectrometry laboratory at the National Center for Nuclear Research in Otwock/Świerk. The analyses revealed concentration of 7Be and the traces of the cosmogenic radionuclides of 48V and 51Cr, whose half-lives are in the range of 15–28 days, clearly confirming the relationship of the specimen with the observed fireball. The relatively high concentrations of 58Co, 56Co, 46Sc, 57Co and 54Mn (half-lives of several months) also confirm the recent fall of the specimen. Additionally, collected radionuclide data allow to estimate pre-atmospheric size of the meteoroid. Distribution of 60Co and 26Al indicates a meteoroid chunk with a radius of 20–25 cm. The result of 26Al measurement suggests that the investigated meteorite fragment comes from a rather shallow depth of this meteoroid. In addition, the original mass of the meteoroid from which the Antonin meteorite originated was estimated to be less than 100 kg, most likely 70 kg.
2
Content available Zastosowanie neutronowej analizy aktywacyjnej NAA do identyfikacji materii pochodzenia kosmicznego na Ziemi
63%
Tymiński Z. , Mysłek-Laurikainen B.
Acta Societatis Metheoriticae Polonorum
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2009
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tom 1
97-100
EN
Neutron activation analysis (NAA) is an analytical method based on the measurement of characteristic radiation from radionuclides formed by neutron irradiation of the material of interest. The most suitable source of neutrons for NAA is a research reactor. The neutron activation analysis has been found to be extremely useful in the determination of trace and minor elements in geological and extraordinary samples. The method is non-destructive, giving many advantages, which are described. Measured abundances of the elements in meteorites, from major constituents down to those appearing only in trace amounts, provide information important for the theories of the origin and history of the Solar System.
3
Content available Powstawanie kraterów impaktowych i ich rodzaje
51%
Brachaniec T. , Tymiński Z. , Broszkiewicz A.
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2014
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tom 5
30-46
EN
Craters form after meteoroid or asteroid impact son celestial bodies surface are created during three different periods: contact/compression, excavation and modification stage. Depending on its size the craters can be divided into three main types: simple, complex and multi-ring craters. The enormous energy released during the impact forms evident records in basis as shatter cones or breccias and affect the surrounding rock (visible only in micro scale) by shock metamorphism, which has no equivalent in the Earth’s geological processes.
4
Content available Sprawozdanie z poszukiwań meteorytów w Oslo
38%
Tymiński Z. , Stolarz M. , Kubalczak T. , Burski M. , Zaręba P. , Holst M. , Bilet M.
Acta Societatis Metheoriticae Polonorum
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2013
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tom 4
108-114
EN
A piece of a meteorite that had crashed through the roof of a cottage house was find in the central Oslo quarter Rodelřkka at the beginning of March 2012. Some days later the second discovery in the melting snow of Ekebergsletta hilltop plateau triggered the hunting for meteorites in almost all sides of Oslo. The pieces of third meteorite broken by cars and spread out by snowplow was discovered on the asphalt road side by Maciek Burski, the member of Polish Meteoritical Society. Later on the missing fragments of the Maciek’s most east find was collected by Meteoritical Section members of Comet and Meteor Workshop (PKiM) with the help of local meteoritical authorities. The total mass of this unobserved fall is 6.22 kg in five pieces spread out in the eight km-long strewnfield with 200 g and 4.65 kg meteorites on the opposite ends. The Meteorite is not classified yet but unofficial information is “breccia H3-4”.
5
Content available Pomiary 60Co w obiektach z żelazną matrycą
32%
Tymiński Z. , Dziel T. , Saganowski P. , Kołakowska E. , Listkowska A. , Tymińska K. , Żołądek P. , Olech A.
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tom 7
144-150
EN
Radioactive cobalt isotope 60Co is produced in neutron activation process of stable isotope 59Co by neutron capture reaction 59Co(n,g)60Co, in solar wind charge exchange 60Ni(n,p)60Co or in spallation process 62Ni(n,p2n)60Co. These processes are responsible for isotope 60Co production either in nuclear reactor on Earth or beyond – in stars and in meteorites (induced by cosmic rays). In this work the results of 60Co measurements in metal sources by gamma spectrometry laboratory are presented. A metal reference radioactive standards made up of steel cast with discs shaped geometries and different diameters have been tested in gamma-ray spectrometry measurement system. The reference activity concentrations of 60Co were in the range of (0.291±0.010) Bq·g–1 to (1.544±0.030) Bq·g–1. The mean minimal detectable activities (MDA) obtained by series of the 6 to 18 hours lasting measurements of described above standards with HPGe detectors carried out in NCBJ OR POLATOM were in the range of 6.1 mBq·g–1 to 8.5 mBq·g–1. The results correspond to the values of 60Co activity concentration measured in the iron meteorites with young terrestrial ages.
6
Content available Badanie zawartości radionuklidów kosmogenicznych oraz składu mineralnego skał w celu weryfikacji ich pozaziemskiego pochodzenia
26%
Tymiński Z. , Burakowska A. , Jaśkiewicz A. , Tymińska K. , Stolarz M. , Kuć M. , Marganiec-Gałązka J. , Czudek M. , Saganowski P. , Iller E. , Krzesińska A. M.
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tom 15
142-153
EN
Cosmogenic radionuclides in meteoroids are produced in space in the process of activation. These nuclides have various lifetimes in range from a few days to several hundred thousand years and can therefore be helpful in solving several problems related to the study of meteoroids and their remains, both in space and on the Earth. The simplest application of cosmogenic radionuclide decay in meteorites is to determine the terrestrial age of meteorites, especially those whose fall has not been observed. In this article, we present an additional application of cosmogenic radionuclide measurements, namely for the verification of origin of rocks that show equivocal features and may potentially represent meteorites.
7
Content available Raport z poszukiwań meteorytów w ramach PFN w sezonie 2016/2017
26%
Tymiński Z. , Żołądek P. , Wiśniewski M. , Stolarz M. , Jaśkiewicz A. , Myszkiewicz M. , Gawroński M. P. , Suchodolski T. , Polakowski K. , Zaręba P. , Olech A.
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2018
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tom 9
158-163
EN
The Meteorite Section was created in 2010 on demand of Polish Fireball Network (PFN) for the meteorite searching and investigation purposes. The main task of the Section is to find the meteorites dropped from bolides registered by the Polish Fireball Network. Each year, the PFN registers several meteorite falls within our country and meteorite strewnfield inspections must be carried out at least for the masses of above 300 g estimated with the PyFN software. Only last year the PFN organized several search campaigns. Two of them are presented in the publication.
8
Content available Raport z poszukiwań meteorytów w ramach PFN w sezonie 2016/2017
26%
Tymiński Z. , Żołądek P. , Wiśniewski M. , Stolarz M. , Jaśkiewicz A. , Myszkiewicz M. , Gawroński M. P. , Suchodolski T. , Polakowski K. , Zaręba P. , Olech A.
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2018
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tom 9
EN
The Meteorite Section was created in 2010 on demand of Polish Fireball Network (PFN) for the meteorite searching and investigation purposes. The main task of the Section is to find the meteorites dropped from bolides registered by the Polish Fireball Network. Each year, the PFN registers several meteorite falls within our country and meteorite strewnfield inspections must be carried out at least for the masses of above 300 g estimated with the PyFN software. Only last year the PFN organized several search campaigns. Two of them are presented in the publication.
9
Content available Raport PFN z poszukiwań meteorytów w latach 2018–2020
23%
Tymiński Z. , Żoładek P. , Wiśniewski M. , Stolarz M. , Polakowski K. , Jaśkiewicz A. , Janasz S. , Gawroński M. P. , Krzyżanowski T. , Kwinta M. , Olech A. , Piatlicki J. , Suchodolski T. , Szlagor M. , Węgrzyk W. , Zaręba P. , Zelevich J.
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tom 12
98-107
EN
Since 2010, the Meteorite Section of the Comet and Meteor Workshop (PKiM) has been systematically organizing exploratory expeditions to selected meteorite strewn fields, calculated from bolides registered with the Polish Fireball Network (PFN). Some of the expeditions organized in the period of 2018–2020, after the phenomena PF140118, PF070119, EN050120 and PF310720 are reported. All these phenomena have a common feature, they reach beyond the borders of Poland – either the analysis was developed in cooperation with the European Fireball Network (EN) or the meteorite fall took place abroad. It is clear that meteor phenomena have no boundaries and for positive research results in near-Earth space science a European cooperation is highly recommended. Many meteorites fallen from the bolides registered in the PFN are still in the strewn field waiting to be discovered. The article presents a study of the most important phenomena happened in two last years, and it is also a hint where to look for meteorites in Europe.
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