48 results on '"*BETA ray spectrometry"'
Search Results
2. Effects of tritium 2-D distribution on tritium depth profile reconstruction in BIXS measurements.
- Author
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Yang, Yang, Chen, Zhilin, Wang, Ruizhen, Wu, Jing, Li, Yixiao, and Peng, Taiping
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X-ray spectroscopy , *TRITIUM , *BETA ray spectrometry , *MONTE Carlo method , *GAUSSIAN distribution , *MATERIALS science - Abstract
Tritium β-ray induced X-ray spectroscopy (BIXS) is a promising nondestructive approach for tritium depth profile analysis of both metallic and nonmetallic materials. In the common BIXS analysis, it is generally assumed that tritium uniformly diffused at a specific depth of the sample. However, in fact, the tritium 2-D concentration in some samples is non-uniform. Therefore, the effects of tritium 2-D distribution on tritium depth profile reconstruction in BIXS method have been studied by Monte Carlo (MC) method in the present paper. Three representative high-Z and low-Z materials, beryllium, carbon and tungsten, were considered in the calculation. And in order to assess the influence of real tritium distributions, effects of Gaussian, linear decreasing, linear increasing, exponential decreasing and exponential increasing 2-D distributions were estimated by comparing their response spectra with uniform distribution. Results show that BIXS analysis might provide inexact results without taking into account of different tritium 2-D distributions, e.g. the relative error of intensities of response spectra in surface region between Gaussian and uniform distribution is approximately 15% in tungsten sample, which becomes larger as the depth increases. It is also indicated that although the spectra shapes varies with different distributions, the diversities are quite small that can be neglected, except for the case that most tritium distributed at the margin or central area of the sample. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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3. THE AMATEUR SCIENTIST.
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BETA ray spectrometry ,SPECTROMETERS ,BETA decay ,BETA rays ,PHYSICS equipment ,SCIENTIFIC discoveries ,RADIOISOTOPES - Abstract
The article focuses on the development of a beta-ray spectrometer by a group of high-school students. The device has become one of the most important tools of modern physics. The instrument built measure the kinetic energy of beta particles emitted during the decaying process of radioactive isotopes.
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- 1958
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4. Characteristics of an extrapolation chamber for Beta-ray protection level measurements.
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Dias, Simone K. and Caldas, Linda V.E.
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BETA ray polarization , *BETA ray spectrometry , *EXTRAPOLATION - Abstract
Presents a study on the extrapolation chamber for beta-ray protection level measurements. Materials and method used; Results and discussion; Conclusions.
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- 1999
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5. Design of a tritium gas cell for beta-ray induced X-ray spectrometry using Monte Carlo simulation.
- Author
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Hara, Masanori, Abe, Shinsuke, Matsuyama, Masao, Aso, Tsukasa, Tatenuma, Katsuyoshi, Kawakami, Tomohiko, and Ito, Takeshi
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GAS analysis , *TRITIUM , *X-ray spectroscopy , *MONTE Carlo method , *BETA ray spectrometry , *BREMSSTRAHLUNG - Abstract
One of the methods used for tritium gas analysis is beta-ray induced X-ray spectrometry (BIXS). Gas cell design is important in this method. The structure of the gas cell for BIXS was optimized by Monte Carlo simulation of beta-ray induced X-ray spectra in various window geometries using the Geant4 tool kit (version 10.01.p02). The simulated spectrum from tritium decay fitted the observed one, and the simulation model was used to obtain the cell parameters for BIXS. The optimum thickness of the gold layer on a beryllium window was around 150 nm. This simulation model also considered the relationship between self-absorption by hydrogen gas and the cell length. Self-absorption increased with increasing cell length and the relationship between the sample pressure and cell length was formulated. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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6. A comparison of 90Sr determination methods using separation on AnaLig® Sr-01 gel and non-destructive direct beta spectrometry.
- Author
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Slaninka, Alojz, Dulanská, Silvia, Slávik, Ondrej, and Mátel, Ľubomír
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STRONTIUM isotopes , *NONDESTRUCTIVE testing , *BETA ray spectrometry , *RADIOCHEMICAL separation , *SORBENTS - Abstract
The results of 90 Sr activity determination by the radiochemical separation method with AnaLig® Sr-01 resin and a non-destructive physical method based on beta spectrometer with plastic scintillator were compared. Smear samples with different contamination levels were analysed. In case of the radiochemical method dissolved smears were repeatedly analysed and compared with the direct beta spectrometry measurements. No statistically significant differences between the results of two different methods were observed. It related to averages as well as to variances of repeated data results. Non-destructive direct 90 Sr beta spectrometry measurements were selective even at high 137 Cs background and provided similar results compared with the radiochemical method using AnaLig® Sr-01 strontium selective sorbent. However, the direct measurements of 90 Sr were quicker and required much less effort during sample preparation. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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7. Metallic magnetic calorimeters.
- Author
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Fleischmann, A., Gastaldo, L., Kempf, S., Kirsch, A., Pabinger, A., Pies, C., Porst, J.-P, Ranitzsch, P., Schäfer, S., Seggern, F. v., Wolf, T., Enss, C., and Seidel, G. M.
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CALORIMETERS , *DETECTORS , *MAGNETIC flux , *BETA ray spectrometry , *GAMMA ray spectrometry - Abstract
Metallic magnetic calorimeters (MMC) are calorimetric particle detectors, typically operated at temperatures below 100 mK, that make use of a paramagnetic temperature sensor to transform the temperature rise upon the absorption of a particle in the detector into a measurable magnetic flux change in a dc-SQUID. During the last years a growing number of groups has started to develop MMC for a wide variety of applications, ranging from alpha-, beta- and gamma-spectrometry over the spatially resolved detection of accelerated molecule fragments to arrays of high resolution x-ray detectors. For x-rays with energies up to 6 keV an energy resolution of 2.7 eV (FWHM) has been demonstrated and we expect that this can be pushed below 1 eV with the next generation of devices. We give an introduction to the physics of MMCs and summarize the presently used readout schemes as well as the typically observed noise contributions and their impact on the energy resolution. We discuss general design considerations, the micro-fabrication of MMCs and the performance of micro-fabricated devices. In this field large progress has been achieved in the last years and the thermodynamic properties of most materials approach bulk values allowing for optimal and predictable performance. [ABSTRACT FROM AUTHOR]
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- 2009
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8. Metallic Magnetic Calorimeters for Beta Spectrometry.
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Loidl, M., Rodrigues, M., Censier, B., Kowalski, S., Mougeot, X., Cassette, P., Branger, T., and Lacour, D.
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CALORIMETERS , *DETECTORS , *BETA ray spectrometry , *SPECTRUM analysis , *IONIZING radiation - Abstract
We are developing metallic magnetic calorimeters for beta spectrometry in the context of ionizing radiation metrology. The aim is the determination of the shape factors of beta spectra. Our latest detector has been designed to measure the spectrum of 241Pu, a pure beta emitter with an endpoint energy of 20.8 keV. We present the spectrum resulting from our first measurement and compare it with theoretical spectra. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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9. Charm meson spectroscopy at Belle.
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Kuzmin, A.
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CHARM particles , *NUCLEAR particle research , *DECAY schemes (Radioactivity) , *BETA ray spectrometry , *ANGULAR correlations (Nuclear physics) ,MESON decay - Abstract
We report studies of production and decay of charmed mesons performed at Belle. Measurements of D** production in the B→D**π and B→D**lv decays are presented. The analysis of the Ds1(2536)+→D+π-K+ decay and study of the angular distributions in the Ds1(2536)+→D*+KS0 decay are reported. [ABSTRACT FROM AUTHOR]
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- 2008
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10. KATRIN: a New Beta-Spectroscopic Experiment to Determine the Neutrino Mass.
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Dragoun, Otokar
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NEUTRINO mass , *BETA ray spectrometry , *RADIOACTIVITY , *ELECTROSTATICS , *SPECTROMETERS - Abstract
Almost sixty years effort to determine the neutrino mass from experimental β-ray spectra resulted recently in the model independent limit of mv<2.3 eV/c2. The Karlsruhe Tritium Neutrino Experiment (KATRTN) should improve this limit to mv<0.2 eV/c2, while the neutrino mass of 0.3 and 0.4 eV/c2 should be seen as 3.5 and 6.5 σ effect, respectively. Some details of the KATRIN setup, including the windowless gaseous tritium source and a tandem of two electrostatic retarding spectrometers with adiabatic magnetic collimation, are outlined. [ABSTRACT FROM AUTHOR]
- Published
- 2007
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11. Superconducting High-Resolution X-Ray Spectrometers For Chemical State Analysis Of Dilute Samples.
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Friedrich, Stephan, Drury, Owen B., Funk, Tobias, Sherrell, Darren, Yachandra, Vittal K., Labov, Simon E., Cramer, Stephen P., and Warwick, T.
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X-rays , *ELECTROMAGNETIC waves , *RADIATION , *ELECTRON spectroscopy , *SPECTROMETERS , *SPECTRUM analysis instruments , *SPECTRUM analysis , *OPTICS , *BETA ray spectrometry - Abstract
Cryogenic X-ray spectrometers operating at temperatures below 1 K combine high energy resolution with broadband efficiency for X-ray energies up to 10 keV. They offer advantages for chemical state analysis of dilute samples by fluorescence-detected X-ray absorption spectroscopy (XAS) in cases where conventional Ge or Si(Li) detectors lack energy resolution and grating spectrometers lack detection efficiency. We are developing soft X-ray spectrometers based on superconducting Nb-Al-AlOx-Al-Nb tunnel junction (STJ) technology. X-rays absorbed in one of the superconducting electrodes generate excess charge carriers in proportion to their energy, thereby producing a measurable temporary increase in tunneling current. For STJ operation at the synchrotron, we have designed a two-stage adiabatic demagnetization refrigerator (ADR) with a cold finger that holds a 3 × 3 array of STJs inside the UHV sample chamber at a temperature of ∼0.1 K within ∼15 mm of a room temperature sample. Our STJ spectrometer can have an energy resolution below 10 eV FWHM for X-ray energies up to 1 keV, and has total count rate capabilities above 100,000 counts/s. We will describe detector performance in synchrotron-based X-ray fluorescence experiments and demonstrate its use for XAS on a dilute metal site in a metalloprotein. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]
- Published
- 2004
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12. An Improvement of (X, eX) Spectrometer for Coincident Measurement of Compton Scattered Photon and Recoiled Electron.
- Author
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Uchiyama, H., Adachi, H., Kishimoto, S., Itou, M., Sakurai, H., Itoh, F., Kawata, H., and Warwick, T.
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COMPTON electrons , *SPECTROMETERS , *SPECTRUM analysis instruments , *SPECTRUM analysis , *RADIATION , *BETA ray spectrometry , *X-rays - Abstract
A coincident measurement between the Compton scattered photon and the recoiled electron gives information about three dimensional electron momentum density (3D-EMD). We improve our (X, eX) spectrometer by introducing a two-dimensional area photon detector which consists of an array of BGO scintillators and a position sensitive photoelectron multiplier tube in order to obtain the 3D-EMD over whole momentum space. We present the details of the improved system, performance and some experimental results. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]
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- 2004
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13. Beta-ray technique applied to the study and reproduction of ancient watermarks.
- Author
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Ponterio, R., Buemi, A., Maisano, G., Majolino, D., and Migliardo, F.
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WATERMARKS , *BETA ray spectrometry , *RADIATION , *PHOTOGRAPHIC film - Abstract
This paper describes the importance of watermarks reproduction, in particular the advantages and potentiality of beta-ray technique’s application to this aim is emphasized. The method involved a radioactive carbon sheet which emits radiation that images a photographic film. After a conventional processing the film produces an exact copy of the watermark. Techniques which give similar results are also considered. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]
- Published
- 2000
14. Lessons Learned From Nuclear Decay Data Measurements in the European Metrology Research Programme ‘Metro Fission’.
- Author
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Pomme, S., Loidl, M., Garcia-Torano, E., Marouli, M., Le-Bret, C., Crespo, M. T., Paepen, J., Mougeot, X., Jobbagy, V., Rodrigues, M., Van Ammel, R., Stroh, H., and Luca, A.
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RADIOACTIVE decay , *ALPHA rays , *NEUTRON counters , *BETA ray spectrometry , *ALPHA ray spectrometry - Abstract
Nuclear decay data measurements were performed in the frame of a EURAMET project. Two specific goals were addressed: (1) High-precision measurements of ^238U alpha-particle emission probabilities and (2) experimental characterization of the shape of beta spectra using cryogenic detectors. In the paper, specific lessons learned from the metrological work are highlighted. This includes effects of source preparation on the quality of alpha and beta spectrometry, the influence of exchange effects on beta spectra and the use of a magnet system to eliminate coincidence effects by conversion electrons in alpha-particle spectra. [ABSTRACT FROM PUBLISHER]
- Published
- 2014
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15. Beta spectrometry with metallic magnetic calorimeters.
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Loidl, M., Rodrigues, M., Le-Bret, C., and Mougeot, X.
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BETA ray spectrometry , *CALORIMETRY , *MAGNETIC properties of metals , *CRYOGENICS , *SPECTRUM analysis , *ELECTROPLATING - Abstract
Abstract: Metallic magnetic calorimeters are a specific type of cryogenic detectors that have been shown to enable precise measurement of the shape of low energy beta spectra. The aim of their use at LNHB is the determination of the shape factors of beta spectra. The beta source is enclosed in the detector absorber, allowing for very high detection efficiency. It has turned out that the type of source is of crucial importance for the correctness of the measured spectrum. Spectra of 63Ni measured with several sources prepared by drying a NiCl2 solution differ from one another and from theory, whereas spectra measured with electroplated sources are reproducible and agree with theory. With these latter measurements we could confirm the atomic exchange effect down to very low energy (200eV). [Copyright &y& Elsevier]
- Published
- 2014
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16. Investigation of activation cross-section data of proton induced nuclear reactions on rhenium.
- Author
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Ditrói, F., Tárkányi, F., Takács, S., Hermanne, A., Yamazaki, H., Baba, M., Mohammadi, A., and Ignatyuk, A.V.
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NUCLEAR reactions , *META-analysis , *EXCITATION spectrum , *RHENIUM isotopes , *BETA ray spectrometry , *CROSS-sectional method - Abstract
Abstract: In the frame of systematic investigations of activation cross-section data for different applications the excitation functions of natRe(p,x)185Os, 183mOs, 183gOs, 182Os, 181mOs, 186gRe, 184mRe, 184gRe, 183Re, 182mRe, 182gRe and 181gRe reactions were measured up to 70MeV. The data for the natRe(p,x) 183mOs, 183gOs, 182Os, 181gOs,186gRe, 184mRe,182mRe, 182gRe, and 181Re reactions are reported for the first time. The activation method, the stacked foil irradiation technique and γ-spectroscopy for activity detection were used. The experimental data were compared with predictions of three theoretical codes. From the measured cross-section thick target integral yields were also calculated and presented. [Copyright &y& Elsevier]
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- 2013
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17. A rapid and inexpensive method for 226Ra and 228Ra measurements of high TDS groundwaters.
- Author
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El-Shrakawy, A., Ebaid, Y.Y., Burnett, W.C., and Aldaihan, Soaad K.
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RADIUM isotopes , *QUALITY assurance , *GROUNDWATER sampling , *ION exchange resins , *ADSORPTION capacity , *WATER chemistry , *BETA ray spectrometry - Abstract
Abstract: A series of laboratory-scale studies was conducted by preconcentrating 226Ra from spiked water test samples using Purolite ion-exchange resin to evaluate the adsorption efficiency of the resin under varying conditions. After removing the resin from the columns, it was sealed in gas-tight containers and measured via gamma spectrometry. The Purolite resin showed high radium uptake and retention from natural waters in the presence of high iron and total dissolved solids (TDS). This procedure allowed us to process a large number of high TDS samples at a typical rate of 15 samples/day using three germanium detectors. Quality assurance and method validation have been achieved by analyzing selected groundwater samples, with different 226Ra activities and high TDS values, and comparing the results to those using alpha spectrometry with a 133Ba yield tracer. There was very good agreement between the obtained 226Ra activities by both methods. [Copyright &y& Elsevier]
- Published
- 2013
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18. Gamma spectrometric determination of the isotopic decomposition of plutonium in containers using MGA and FRAM software.
- Author
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Bushuev, A., Aleeva, T., Kozhin, A., Petrova, E., Zubarev, V., Pavlov, A., Myrzin, A., and Syrosev, A.
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GAMMA ray spectrometry , *PLUTONIUM isotopes , *BETA ray spectrometry , *RADIOACTIVE decontamination , *RADIOACTIVE waste storage , *COMPUTER software - Abstract
Plutonium dioxide is stored in special containers, holding about 3 kg plutonium each, in a dump at the RT-1 plant of the Industrial Association Mayak. The certificates on the containers with plutonium produced in 1990-2000 do not contain any data on the isotopic composition. Without removing the plutonium from a container, the isotopic composition can be determined only by γ-spectrometry. This paper compares the MGA and FRAM computer codes used to determine the isotopic composition of the plutonium when performing measurements on samples with a large mass. [ABSTRACT FROM AUTHOR]
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- 2012
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19. Lateral variation of 134Cs and 137Cs concentrations in surface seawater in and around the Japan Sea after the Fukushima Dai-ichi Nuclear Power Plant accident
- Author
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Inoue, M., Kofuji, H., Nagao, S., Yamamoto, M., Hamajima, Y., Yoshida, K., Fujimoto, K., Takada, T., and Isoda, Y.
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CESIUM isotopes , *SEAWATER , *NUCLIDES , *ATMOSPHERIC transport , *AEROSOLS , *NUCLEAR power plants , *BETA ray spectrometry - Abstract
Abstract: A total of 82 surface seawater samples was collected in the Japan Sea and the southwestern Okhotsk Sea before and after the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident. Analysis of 134Cs and 137Cs concentrations using low-background γ-spectrometry revealed that the 137Cs concentration of the samples collected in June 2011 was 1.5–2.8mBq/L, which is approximately 1–2 times higher than the pre-accident 137Cs level, while the 134Cs concentration was less than detectable to 1mBq/L. In addition to 134Cs being clearly detected (∼1mBq/L), 137Cs concentration in water samples from the northeastern Japan Sea (2–2.8mBq/L) was also higher than that from the coast in the southwestern Japan Sea (∼1.5mBq/L). These higher concentrations in the northeastern Japan Sea could be ascribed to the atmospheric transport of nuclides from the FDNPP as aerosols and subsequent transport and dilution after delivery to the sea surface. [Copyright &y& Elsevier]
- Published
- 2012
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20. Radiological investigations at the “Taiga” nuclear explosion site, part II: man-made γ-ray emitting radionuclides in the ground and the resultant kerma rate in air
- Author
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Ramzaev, V., Repin, V., Medvedev, A., Khramtsov, E., Timofeeva, M., and Yakovlev, V.
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RADIOLOGY , *NUCLEAR explosions , *RADIOISOTOPES , *LICHENS , *BETA ray spectrometry , *SOIL sampling , *NUCLEAR activation analysis - Abstract
Abstract: Samples of soil and epigeic lichens were collected from the “Taiga” peaceful nuclear explosion site (61.30°N 56.60°E, the Perm region, Russia) in 2009 and analyzed using high resolution γ-ray spectrometry. For soil samples obtained at six different plots, two products of fission (137Cs and 155Eu), five products of neutron activation (60Co, 94Nb, 152Eu, 154Eu, 207Bi) and 241Am have been identified and quantified. The maximal activity concentrations of 60Co, 137Cs, and 241Am for the soils samples were measured as 1650, 7100, and 6800 Bq kg−1 (d.w.), respectively. The deposit of 137Cs for the top 20 cm of soil on the tested plots at the “Taiga” site ranged from 30 to 1020 kBq m−2; the maximal value greatly (by almost 3 orders of magnitude) exceeded the regional background (from global fallout) level of 1.4 kBq m−2. 137Cs contributes approximately 57% of the total ground inventory of the man-made γ-ray emitters for the six plots tested at the “Taiga” site. The other major radionuclides –241Am and 60Co, constitute around 40%. Such radionuclides as 60Co, 137Cs, 241Am, and 207Bi have also been determined for the epigeic lichens (genera Cladonia) that colonized certain areas at the ground lip produced by the “Taiga” explosion. Maximal activity concentrations (up to 80 Bq kg−1 for 60Co, 580 Bq kg−1 for 137Cs, 200 Bq kg−1 for 241Am, and 5 Bq kg−1 for 207Bi; all are given in terms of d.w.) have been detected for the lower dead section of the organisms. The air kerma rates associated with the anthropogenic sources of gamma radiation have been calculated using the data obtained from the laboratory analysis. For the six plots tested, the kerma rates ranged from 50 to 1200 nGy h−1; on average, 51% of the dose can be attributed to 137Cs and 45% to 60Co. These estimates agree reasonably well with the results of the in situ measurements made during our field survey of the “Taiga” site in August 2009. [Copyright &y& Elsevier]
- Published
- 2012
- Full Text
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21. Selection of beta signals in electronic noise band.
- Author
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Celiktas, Cuneyt
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ELECTRONIC noise , *SCINTILLATION counters , *BETA ray spectrometry , *PLASTICS , *NUCLEAR energy , *SPECTRUM analysis - Abstract
A beta spectrometer composed of a solid BC-400 type plastic scintillation detector was designed to select the original beta particles from the electronic noise in the low-energy part of the C beta spectrum by means of a timing discrimination method. Efficient selection of the beta particles in the noise band was achieved. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
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22. Excited states of the 150Pm odd-odd nucleus.
- Author
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Bucurescu, D., Drăgulescu, E., Pascu, S., Wirth, H.-F., Filipescu, D., Căta-Dani, G., Căta-Danil, I., Deleanu, D., Eppinger, K., Faestermann, T., Ghiţă, D. G., Glodariu, T., Hertenberger, R., Iva&sbreve;cu, M., Krücken, R., Mărginean, N., Mărginean, R., Mihai, C., Negret, A., and Sava, T.
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EXCITED state chemistry , *BETA ray spectrometry , *NUCLEAR structure , *DOUBLE beta decay , *QUANTUM phase transitions , *DIRECT reactions (Nuclear physics) , *LINEAR accelerators ,PROMETHIUM isotopes - Abstract
The knowledge of excited states in the odd-odd 150Pm, completely unknown until recently, is important both for understanding double &bgr; decay of 150Nd and for nuclear structure studies in mass regions with a quantum phase transition. A large number of excited states have been determined for the first time in this nucleus by measuring spectra of the 152Sm(d,&agr;) direct reaction at 25 MeV with the Munich Q3D spectrograph and by &ggr;-ray spectroscopy with the (p, ny) reaction at 7.1 MeV at the Bucharest tandem accelerator. Some of these levels correspond to peaks recently observed with the (3He,r) reaction at 140 MeV/u. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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23. A high-selectivity β spectrometer.
- Author
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Apalin, V., Balygin, K., Zaitsev, V., Karetnikov, M., Klimov, A., Kopeikin, V., Meleshko, E., and Sabel'nikov, A.
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BETA ray spectrometry , *SPECTROMETERS , *NEUTRONS , *SCINTILLATION spectrometry , *PARTICLES (Nuclear physics) , *RADIOACTIVE nuclear beams , *SPECTRUM analysis instruments - Abstract
Measurements of β spectra from fission fragments are complicated by high background of γ rays and neutrons. A scintillation β spectrometer capable of precisely reconstructing the β particle spectra in the energy range of >1 MeV has been developed to reduce the effect of this background without deteriorating the high detection efficiency for β particles. The functional diagram of the spectrometer is described, and the results of spectrometer testing using radioactive electron sources are presented. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
24. Indoor radon measurements in a Greek city located in the vicinity of lignite-fired power plants
- Author
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Manousakas, M., Fouskas, A., Papaefthymiou, H., Koukouliou, V., Siavalas, G., and Kritidis, P.
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RADON measures , *COAL-fired power plants , *DWELLINGS , *MEGALOPOLIS , *BETA ray spectrometry - Abstract
Abstract: This work presents indoor radon measurements in 42 dwellings in the city of Megalopolis, Southern Greece, located in the vicinity of 2 lignite-fired power plants and examines the effect of season, floor level and age of the dwellings on indoor radon concentration. The radon measurements have been carried out using the LR-115, type II and CR-39 alpha track detectors in “closed-can” geometry. The average annual indoor radon concentration (GM) was found to be 52 Bq m−3, which is well below the recommended action level of the European Union. This value corresponds to an annual effective dose to the population of 1.3 ± 0.4 mSv. Season and age of the examined dwellings represent factors that affected significantly the indoor radon in Megalopolis, while the effect of floor level appeared to be not significant. Radium activity concentration values, measured by γ-ray spectrometry in 20 sub-samples of six soil cores (60–135 cm depth), collected from the surrounding area of the city, were found to be consistent with the Greek and world average values. Based on the results of this study, it is concluded that the effect of the lignite-fired power plants on indoor radon concentration in Megalopolis’ dwellings was not significant. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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25. Standardization and measurement of gamma-ray probability per decay of 177Lu
- Author
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Dias, Mauro S., Silva, Fabrício F.V., and Koskinas, Marina F.
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STANDARDIZATION , *LUTETIUM isotopes , *GAMMA rays , *BETA ray spectrometry , *SCINTILLATION counters , *MONTE Carlo method , *RADIOACTIVE source strength - Abstract
Abstract: The procedure followed by the Nuclear Metrology Laboratory (LMN), at the Nuclear and Energy Research Institute (IPEN), for the primary standardization of 177Lu is described. This radionuclide is widely used in radiopharmacy due to its convenient half-life and emitted beta ray energies. The 177Lu solution was supplied during an international comparison sponsored by BIPM in 2009 and the primary standardization has been accomplished by the 4πβ-γ coincidence method using a proportional counter in 4π geometry coupled with two NaI(Tl) scintillation counters. The beta efficiency was varied by placing Collodion and aluminum absorbers over and under the radioactive source. The 177Lu calibrated sources were also measured in a previously calibrated HPGe spectrometer, in order to obtain the emission probability per decay for the selected gamma-ray transitions. The experimental extrapolation curves were also compared with Monte Carlo simulations by means of code ESQUEMA developed at the LMN. [Copyright &y& Elsevier]
- Published
- 2010
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26. TlBr and TlBr x I1− x crystals for γ-ray detectors
- Author
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Churilov, Alexei V., Ciampi, Guido, Kim, Hadong, Higgins, William M., Cirignano, Leonard J., Olschner, Fred, Biteman, Viktor, Minchello, Mark, and Shah, Kanai S.
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SEMICONDUCTORS , *HALIDES , *THALLIUM compounds , *CHEMICAL detectors , *BETA ray spectrometry , *MELTING points , *MOLECULAR structure , *SCATTERING (Physics) - Abstract
Abstract: TlBr and TlBr x I1− x are wide bandgap semiconductor materials being investigated for applications in γ-ray spectroscopy. They have a good combination of density and atomic numbers, promising to make them very efficient detectors. Their low melting points and simple cubic and orthorhombic crystal structures are favorable for bulk crystal growth. However, these semiconductors need to be extremely pure to become useful as radiation detectors. Impurities can lead to charge trapping and scattering, reducing the charge transit lengths and limiting the detector thickness to <1mm. Additional purification steps were implemented to improve the purity and mobility–lifetime product (μτ) of electrons. Detector-grade TlBr with the electron μτ product of up to 6×10−3 cm2/V has been produced, which allowed operation of detectors up to 15mm thickness. The ternary TlBr x I1− x was investigated at different compositions to vary the bandgap and explore the effect of added TlI on the long term stability of detectors. The material analysis and detector characterization results are included. [Copyright &y& Elsevier]
- Published
- 2010
- Full Text
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27. Numerical expressions for the computation of coincidence-summing correction factors in γ-ray spectrometry with HPGe detectors
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Rizzo, S. and Tomarchio, E.
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- *
BETA ray spectrometry , *COMPUTER software , *SCHEMES (Algebraic geometry) , *NUMERICAL analysis , *COINCIDENCE theory , *CORRECTION factors , *DETECTORS , *GERMANIUM diodes - Abstract
Abstract: Numerical expressions to compute γ–γ and γ–XK coincidence summing corrections were deduced by using a suitable computer program and a matrix representation of a decay scheme. For point sources only full-energy peak and total efficiencies are needed. Alternatively, values of peak-to-total ratio can be introduced. For extended sources, the same expressions can be considered with the introduction of “effective efficiencies”. Examples of the use of the expressions for point sources and a particulate filter sample measured with a 60% relative efficiency HPGe detector are reported. [Copyright &y& Elsevier]
- Published
- 2010
- Full Text
- View/download PDF
28. Effects of γ-radiation on the fungus Alternaria alternata in artificially inoculated cereal samples
- Author
-
Braghini, R., Pozzi, C.R., Aquino, S., Rocha, L.O., and Corrêa, B.
- Subjects
- *
BETA ray spectrometry , *PHYSIOLOGICAL effects of radiation , *ALTERNARIA , *FUNGI , *GRAIN , *RADIATION doses , *IRRADIATION - Abstract
Abstract: The objective of this study was to evaluate the effects of different γ-radiation doses on the growth of Alternaria alternata in artificially inoculated cereal samples. Seeds and grains were divided into four groups: Control Group (not irradiated), and Groups 1, 2 and 3, inoculated with an A. alternata spore suspension (1×106 spores/mL) and exposed to 2, 5 and 10kGy, respectively. Serial dilutions of the samples were prepared and seeded on DRBC (dichloran rose bengal chloramphenicol agar) and DCMA (dichloran chloramphenicol malt extract agar) media, after which the number of colony-forming units per gram was determined in each group. In addition, fungal morphology after irradiation was analyzed by scanning electron microscopy (SEM). The results showed that ionizing radiation at a dose of 5kGy was effective in reducing the growth of A. alternata. However, a dose of 10kGy was necessary to inhibit fungal growth completely. SEM made it possible to visualize structural alterations induced by the different γ-radiation doses used. [Copyright &y& Elsevier]
- Published
- 2009
- Full Text
- View/download PDF
29. Comparison of reconstruction methods of depth distribution of tritium in materials based on BIXS
- Author
-
Long, JingJing and An, Zhu
- Subjects
- *
BETA ray spectrometry , *TRITIUM , *INVERSE problems , *MONTE Carlo method , *SURFACES (Technology) , *MOLYBDENUM , *SIMULATION methods & models - Abstract
Abstract: Three reconstruction methods based on Tikhonov regularization are used to solve the ill-posed inverse problem when incorporating Monte Carlo calculations into the β-ray induced X-ray spectrometry (BIXS) for analyzing the tritium content and depth distribution in the material surface. These methods are implemented by the GENEREG, CONTIN and REGUTOOLS codes, respectively. The tritium sample is assumed to be a molybdenum slab of 5μm thickness, and an argon gas of 5mm thickness is filled in front of the molybdenum slab. The Monte Carlo code PENELOPE is used to simulate the X-ray energy spectra induced by tritium’s β-decays. The reconstruction results for tritium depth distributions by these three codes are compared and the comparison shows that the code GENEREG can give satisfactory results. Some discussions are made. [Copyright &y& Elsevier]
- Published
- 2009
- Full Text
- View/download PDF
30. A wavelet-based pulse shape discrimination method for simultaneous beta and gamma spectroscopy
- Author
-
Yousefi, Siavash and Lucchese, Luca
- Subjects
- *
GAMMA ray spectrometry , *BETA ray spectrometry , *WAVELETS (Mathematics) , *SCINTILLATION counters , *TIME-domain analysis , *DIGITAL signal processing - Abstract
Abstract: In this paper, a novel pulse shape discrimination method in scintillator detectors for simultaneous beta and gamma spectroscopy is presented. This method is based on using wavelets to discriminate between pulse shapes in the frequency (scale) domain rather than in the time domain. The proposed method shows a better discrimination performance compared to other time-domain methods in terms of robustness to noise and reliability. This method is also able to detect pile-up events which could not be detected using other time-domain methods. This method can be easily implemented with FPGA technology and digital signal processors. [Copyright &y& Elsevier]
- Published
- 2009
- Full Text
- View/download PDF
31. UNFOLDING CONTINUOUS PHOTON SPECTRUM EMITTED FROM 90Sr-90Y IN EQUILIBRIUM.
- Author
-
ALMAZ, E., CENGIZ, A., and TARTAR, A.
- Subjects
- *
NUCLEAR reactions , *BREMSSTRAHLUNG , *PARTICLES (Nuclear physics) , *BETA rays , *ALGORITHMS , *BETA ray spectrometry - Abstract
This paper presents an experiment with the 2×2 inch NaI(Tl) detector to measure the internal bremsstrahlung of 90Sr-90Y in equilibrium beta particle emitters using the beta-stopper method in the range 10–1750 keV. The Gold algorithm is applied to unfold the internal bremsstrahlung spectrum of 90Sr-90Y beta source. Unfolded IB spectrum is compared with the KUB theory. There is good agreement between the theory and the unfolded measured spectrum in the energy range below 1000 keV. Beyond this energy, there are discrepancies between the theory and unfolded spectrum. [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
- View/download PDF
32. A phoswich detector for β-ray spectrometry.
- Author
-
Arsaev, M. and Kladov, A.
- Subjects
- *
DETECTORS , *BETA ray spectrometry , *PLASTICS , *SCINTILLATORS , *FORCE & energy - Abstract
The spectrometric characteristics of a scintillation phoswich detector for β-ray spectrometry are described. The phoswich detector is composed of two detectors, one of which is an inorganic scintillator (calcium chlorborate) and the other is a scintillating plastic. The background of this phoswich detector is a factor of 9.3 lower than that of a single detector based on a plastic scintillator. At the same time, the dependence of its pulse heights on the β-particle energy is shown to be linear. [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
- View/download PDF
33. A NON-QUASINILPOTENT OPERATOR WHICH COMMUTES WITH A QUASINILPOTENT SHIFT.
- Author
-
HEDAYATIAN, K.
- Subjects
- *
SHIFT-share analysis , *BETA ray spectrometry , *SPECTRUM analysis , *MATHEMATICAL formulas , *GENERAL relativity (Physics) , *COLLISION spectroscopy - Abstract
We will use a result of Bade, Dales and Laursen to construct a quasinilpotent weighted shift and an operator commuting with it with spectrum more than one point. [ABSTRACT FROM AUTHOR]
- Published
- 2006
- Full Text
- View/download PDF
34. Natural radionuclides and 137Cs activity concentration in the bottom sediment cores from Kuwait Bay.
- Author
-
Al.-Zamel, A. Z., Bou-Rabee, F., Olszewski, M., and Bem, H.
- Subjects
- *
RADIOISOTOPES , *SEDIMENTS , *BETA ray spectrometry , *URANIUM isotopes - Abstract
The activity concentration of natural radionuclides and 137Cs in the bottom sediments cores from Kuwait Bay have been determined by γ-ray spectrometry. Particular attention was devoted to the exact determination of two uranium isotopes: 235U and 238U in order to find any presence of depleted uranium dispersed during the 1991 Gulf War. The calculated 238U/235U activity ratios for all the surface (15 cm) as well as the core profile (up to 70 cm in depth) samples were within the limit of one standard deviation close to the value of 21.5 for natural uranium. Simultaneous instrumental determination of the unsupported 210Pb and 226Ra in a few sediment core profiles was used for quantification of sediment accumulation rates. The calculated sedimentation rates (for the constant atmospheric 210Pb flux rate - CRS model) ranged from 0.2 to 0.6 cm . y-1 and were close to the data calculated by the Weibull distribution of 137Cs in undisturbed sediment cores. [ABSTRACT FROM AUTHOR]
- Published
- 2005
- Full Text
- View/download PDF
35. Measurement of the Magnetic Moment of the First Excited State in 93Sr Using on-line TDPAC technique.
- Author
-
Sasanuma, T., Taniguchi, A., Tanigaki, M., Ohkubo, Y., and Kawase, Y.
- Subjects
- *
ANGULAR correlations (Nuclear physics) , *NUCLEAR reactions , *PAIRING correlations (Nuclear physics) , *ANGULAR distribution (Nuclear physics) , *BETA ray spectrometry , *TRANSITION metals , *ROTATIONAL motion - Abstract
The g-factor of the first excited state of 93Sr ( E = 213 keV, T 1/2 = 4.6 ns) was measured by an on-line TDPAC technique with use of the strong hyperfine field in Fe metal. The Larmor frequency ω L = (2.60 ± 0.15) × 108 rad/s was obtained. The g-factor is derived as g = −0.227 ± 0.013 from g = − ℏω L/ B hf μ N. If the spin of the first excited state of 93Sr is assumed to be 3/2, the g-factor is predicted by a simple core-excitation model as g = −0.22, which is in good agreement with the present experimental result. [ABSTRACT FROM AUTHOR]
- Published
- 2004
- Full Text
- View/download PDF
36. Atomic “After Effects” Following 181Hfβ--Decay.
- Author
-
Dey, C. C.
- Subjects
- *
ATOMS , *BETA ray spectrometry , *VISCOSITY , *IONIC solutions , *ANGULAR correlations (Nuclear physics) , *FLUID dynamics , *NUCLEAR reactions , *SOLUTION (Chemistry) - Abstract
Strong evidence of atomic “after effects” following β--decay of 181Hf was observed from perturbed angular correlation (PAC) studies in different viscous and non-viscous molecular solutions and in ionic as well as non-ionic solutions. In non-viscous acetone and H2O solutions, the PAC spectra have been found to be completely different to what was expected considering molecular motions in these media. Similarly, in the glycerol–H2O system, PAC spectra remain significantly unchanged with the change of viscosity indicating that molecular motions are not reflected in these media. Rather, perturbations from the interaction of the nucleus-excited atomic state, which was so far considered to be absent for 181Hf β--decay, have been found to be dominant. The atomic shell recovery times in molecular liquids have been found to be in the range 50–150 nsec. In insulating solid HfCl4 medium, however, the PAC spectrum indicates that the atomic shell following 181Hf β--decay remains unchanged within the lifetime of the intermediate state. The lifetime for the 615 keV level has been remeasured and a value of T1/2=12.1±0.1 nsec only has been obtained. This value, although in strong disagreement with the earlier reported value (17.83 μsec), helps explain atomic “after effects” in 181Hf β--decay. [ABSTRACT FROM AUTHOR]
- Published
- 2004
- Full Text
- View/download PDF
37. Processing of Tracks and Beta-Ray Spectrograms with the MAS-1 Universal Setup.
- Author
-
Egorov, O. K., Islamov, T. A., Kalinnikov, V. G., Kambarova, N. T., Kolesnikov, V. V., Muminov, T. M., Silaev, V. I., and Solnyshkin, A. A.
- Subjects
- *
MESONS , *BETA ray spectrometry - Abstract
Results of processing photoemulsion plates exposed in several experiments that were performed on the MAS-1 automated complex with a microscope are reported. Specifically, the case of detecting a charmed meson in the WA-95 (CERN) experiment is considered. Also, the processing of internal conversion electron spectrograms that are recorded with a beta-ray spectrograph equipped with a precision image-sensing TV system providing an accuracy of 1 µm in three coordinates is described. [ABSTRACT FROM AUTHOR]
- Published
- 2003
- Full Text
- View/download PDF
38. A Solid-State Intraoperative Beta Probe System.
- Author
-
Raylman, Raymond R.
- Subjects
- *
BETA ray spectrometry , *SILICON diodes , *RADIATION dosimetry , *RADIOISOTOPES - Abstract
Presents a study which described a probe system that utilized a photon correction scheme consisting of a stack of two ion-implanted-silicon detectors mounted in a compact unit. Materials and methods; Results; Discussion.
- Published
- 2000
39. β-ray priming of CVD diamond films - An impedance study.
- Author
-
Girija, K. G., Betty, C. A., Nuwad, J., Gandhi, S. S., Udhayakumar, J., and Pillai, C. G. S.
- Subjects
- *
DIAMONDS , *THIN films , *CHEMICAL vapor deposition , *IMPEDANCE spectroscopy , *BETA ray spectrometry , *CRYSTAL grain boundaries - Abstract
Impedance spectroscopy was employed to study the effect of β-ray priming on Hot Filament CVD diamond films. The results suggested that there was substantial passivation of in-grain defects whereas the grain boundary defects were only marginally affected. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
40. DIGITAL ELECTRONICS AND THEIR APPLICATION TO BETA DECAY SPECTROSCOPY.
- Author
-
LIDDICK, S. N., PADGETT, S., and GRZYWACZ, R.
- Subjects
DIGITAL electronics ,BETA decay ,BETA ray spectrometry ,NUCLEAR physics ,ELECTRONS - Published
- 2008
41. Spectroscopy of 26F.
- Author
-
Stanoiu, M., Sohler, D., Sorlin, O., Dombrádi, Zs., Azaiez, F., Brown, B. A., Boreca, C., Bourgeoies, C., Elekes, Z., Fillop, Zs., Grévy, S., Guillemaud-Mueller, D., Ibrahim, F., Kerek, A., Krasznahorkay, A., Lewitowicz, M., Lukyanov, S. M., Mrázek, J., Negoita, F., and Penionzhkevich, Yu.-E.
- Subjects
- *
BETA ray spectrometry , *NUCLEAR structure , *FLUORINE isotopes , *EXCITED state chemistry , *GROUND state (Quantum mechanics) , *BETA decay - Abstract
The structure of the weakly bound 269,F17 odd-odd nucleus, produced from 27,28Na nuclei, has been investigated at GANIL by means of the in-beam &ggr;-ray spectroscopy technique. A single &ggr;-line is observed at 657(7) keV in 2,F which has been ascribed to the decay of the excited J = 2+ state to the J = 1+ ground state. The possible presence of intruder negative parity states in 26F is also discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
42. Reaching high sensitivity of radio-acoustic spectroscopy using "strong microwaves".
- Author
-
Koshelev, M. A., Vilkov, I. N., Tsvetkov, A. I., Glyavin, M. Yu., and Tretyakov, M. Yu.
- Subjects
- *
SPECTROMETERS , *GAS absorption & adsorption , *SPECTROMETRY , *BETA ray spectrometry , *RADIATION , *SPECTRUM analysis - Abstract
The article discusses the study on the high sensitivity of a spectrometer with radioacoustic detection of gas absorption. The study reportedly involved several methods to reach its high sensitivity which include increasing radiation power. Also explored are the importance of gas molecular spectroscopy and the factors affecting the sensitivity of a spectrometer.
- Published
- 2017
- Full Text
- View/download PDF
43. The Chandra COSMOS-Legacy Survey: Source X-Ray Spectral Properties
- Author
-
John D. Silverman, Kazushi Iwasawa, Giorgio Lanzuisi, Francesca Civano, C. M. Urry, G. Zamorani, Andrea Comastri, Stefano Marchesi, Richard E. Griffiths, Piero Ranalli, Viola Allevato, Mara Salvato, Takamitsu Miyaji, Hyewon Suh, Ezequiel Treister, Kevin Schawinski, Cristian Vignali, Department of Physics, ITA, USA, DEU, ESP, CHL, FIN, JPN, MEX, SWE, CHE, Universitat de Barcelona, Marchesi, S., Lanzuisi, G., Civano, F., Iwasawa, K., Suh, H., Comastri, A., Zamorani, G., Allevato, V., Griffiths, R., Miyaji, T., Ranalli, P., Salvato, M., Schawinski, K., Silverman, J., Treister, E., Urry, C.M., Vignali, C., and Urry, C. M.
- Subjects
galaxie [X-rays] ,ACTIVE GALACTIC NUCLEI ,COMPTON-THICK AGN ,Photon ,Active galactic nucleus ,HEAVILY OBSCURED AGN ,Astrophysics::High Energy Astrophysical Phenomena ,galaxies: active ,nuclei [galaxies] ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Beta ray spectrometry ,0103 physical sciences ,STAR-FORMING GALAXIES ,Emission spectrum ,DEEP FIELD-SOUTH ,Absorption (electromagnetic radiation) ,SEYFERT 2 GALAXIES ,010303 astronomy & astrophysics ,XMM-NEWTON OBSERVATIONS ,PHOTOMETRIC REDSHIFTS ,Astrophysics::Galaxy Astrophysics ,Physics ,EVOLUTION SURVEY COSMOS ,Cosmologia ,010308 nuclear & particles physics ,Star formation ,ABSORBING COLUMN DENSITIES ,X-ray ,Astronomy and Astrophysics ,Astronomy and Astrophysic ,115 Astronomy, Space science ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Galaxy ,Espectrometria de raigs beta ,Cosmology ,X-rays: galaxies ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,active [galaxies] ,galaxies: nuclei - Abstract
We present the X-ray spectral analysis of the 1855 extragalactic sources in the Chandra COSMOS-Legacy survey catalog having more than 30 net counts in the 0.5-7 keV band. 38% of the sources are optically classified Type 1 active galactic nuclei (AGN), 60% are Type 2 AGN and 2% are passive, low-redshift galaxies. We study the distribution of AGN photon index and of the intrinsic absorption N(H,z) based on the sources optical classification: Type 1 have a slightly steeper mean photon index than Type 2 AGN, which on the other hand have average intrinsic absorption ~3 times higher than Type 1 AGN. We find that ~15% of Type 1 AGN have N(H,z)>1E22 cm^(-2), i.e., are obscured according to the X-ray spectral fitting; the vast majority of these sources have L(2-10keV)>$1E44 erg/s. The existence of these objects suggests that optical and X-ray obscuration can be caused by different phenomena, the X-ray obscuration being for example caused by dust-free material surrounding the inner part of the nuclei. ~18% of Type 2 AGN have N(H,z), Comment: 23 pages, 16 figures. Accepted for publication on ApJ
- Published
- 2016
44. Neutron capture by fissile and fertile actinide targets.
- Author
-
Maslov, Vladimir M.
- Subjects
- *
ACTINIDE elements , *NEUTRON capture , *INELASTIC neutron scattering , *NUCLEAR fission , *HADRON-nuclei interactions , *BETA ray spectrometry - Abstract
For fissile actinide targets 233U, 235U and 239Pu the capture cross sections are strongly influenced by the target spin, fission transition states spectroscopy and fission/γ-emission competition of the compound nuclides. The capture cross sections were obtained via a consistent description of fission and elastic/inelastic scattering, (n,γf) reaction being included. For neutron capture reactions on even-even U, Pu and Cm nuclei the methods, proven in case of 232Th(n,γ) and 238U(n,γ) data analysis are used. Calculated 240Pu(n,γ) and 244Cm(n,γ) reaction cross sections shapes are much similar to that, observed for the 238U(n,γ) and 232Th(n,γ) reactions. Differences are due to fission and neutron emission competition, which depends on the (Z,N)-composition of the compound nucleus. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
45. A Study Of The Radionuclidic Content Of The Environmental Samples Resulting From NIPNE Activities.
- Author
-
Stochioiu, Ana I., Bercea, Sorin I., Ivan, Constantin G., Dumitru, Octavian R., and Pantelica, Ana I.
- Subjects
- *
RADIOISOTOPES , *GAMMA ray spectrometry , *ALPHA ray spectrometry , *BETA ray spectrometry , *PHYSICS - Abstract
The results of alpha, beta, gamma global activity measurements and gamma spectrometric measurements are presented. For more detailed characterization of samples, gamma-spectrometric measurement, implying identification of radionuclides and their activities are carried-out on significant ambiental annual samples. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
- View/download PDF
46. Correlation and spectrum shape measurements in β-decay probing the standard model.
- Author
-
N Severijns
- Subjects
- *
PAIRING correlations (Nuclear physics) , *BETA ray spectrometry , *WEAK interactions (Nuclear physics) , *BETA decay , *SYMMETRY (Physics) - Abstract
The beta-decay process offers unique possibilities for testing the fundamental symmetries of the standard model and searching for non-standard model components in the weak interaction. Here a non-exhaustive review of this field is given highlighting a number of key experiments or recently performed experiments. Also included are new and ongoing developments providing new opportunities for further significant progress in this research field in the era of the large hadron collider. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
47. Precise measurement of nuclear isomers in the storage ring at GSI
- Author
-
Sun, B., Bosch, F., Boutin, D., Brandau, C., Chen, L., Dimopoulou, C., Fabian, B., Geissel, H., Knöbel, R., Kozhuharov, C., Kurcewicz, J., Litvinov, S.A., Litvinov, Yu.A., Meng, J., Münzenberg, G., Nociforo, C., Nolden, F., Plaß, W.R., Scheidenberger, C., and Steck, M.
- Subjects
- *
NUCLEAR isomers , *ATOMIC mass , *NUCLEAR physics , *BETA ray spectrometry , *NUCLEAR facilities - Abstract
Abstract: High precision direct mass measurements have shown strong potential to identify and determine new nuclear isomeric states, and therefore to add intriguing new nuclear physics information by going beyond γ-ray spectroscopy. The principle and characteristic experimental results of isomer investigations in the storage ring at GSI are discussed. [Copyright &y& Elsevier]
- Published
- 2010
- Full Text
- View/download PDF
48. A. A spectrometer for continuous beta emissions of radioactive species ; B. Disintegration of praesodymium--144 ; C. A study of radioactivity in atmospheric precipitation in Columbus, Ohio /
- Author
-
Kiley, Leo Austin
- Subjects
- Chemistry, Beta rays, Beta ray spectrometry, Praseodymium, Radioactive fallout
- Published
- 1952
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