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479 results on '"Gorelov, D."'

104. A1014 - Propensity score-matched analysis comparing retrograde intrarenal surgery with percutaneous nephrolithotomy in anomalous kidneys

Author

Lim, E.J., Teoh, J.Y-C., Fong, K.Y., Emiliani, E., Gadzhiev, N., Gorelov, D., Tanidir, Y., Sepulveda, F., Al-Terki, A., Khadgi, S., Mahajan, A., Ragoori, D., Ramalingam, G., Mohan, V.C., Ganpule, A.P., Kumar, S., Castellani, D., Monga, M., Cesare, S., Vicentini, F.C., Traxer, O., Somani, B.K., and Gauhar, V.

Published
2022
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106. Theoretical and experimental studies of the neutron rich fission product yields at intermediate energies

Author

Äystö J., Penttilä H., Gorelov D., and Rubchenya V.A.

Subjects
Physics, QC1-999
Abstract

A new method to measure the fission product independent yields employing the ion guide technique and a Penning trap as a precision mass filter, which allows an unambiguous identification of the nuclides is presented. The method was used to determine the independent yields in the proton-induced fission of 232Th and 238U at 25 MeV. The data were analyzed with the consistent model for description of the fission product formation cross section at the projectile energies up to 100 MeV. Pre-compound nucleon emission is described with the two-component exciton model using Monte Carlo method. Decay of excited compound nuclei is treated within time-dependent statistical model with inclusion of the nuclear friction effect. The charge distribution of the primary fragment isobaric chain was considered as a result of frozen quantal fluctuations of the isovector nuclear density. The theoretical predictions of the independent fission product cross sections are used for normalization of the measured fission product isotopic distributions.

Published
2012
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107. First determination of beta-delayed multiple neutron emission beyond A=100 through direct neutron measurement : The P-2n value of Sb-136

Author

Caballero-Folch, R., Dillmann, I., Agramunt, J., Tain, J. L., Algora, A., Äystö, J., Calvino, F., Canete, L., Cortes, G., Domingo-Pardo, C., Eronen, T., Ganioglu, E., Gelletly, W., Gorelov, D., Guadilla, V., Hakala, J., Jokinen, A., Kankainen, A., Kolhinen, V. S, Koponen, J., Marta, M., Mendoza, E., Montaner-Piza, A., Moore, I., Nobs, C. R., Orrigo, S. E. A., Penttilä, H., Pohjalainen, J., Reinikainen, J., Riego, A., Rinta-Antila, S., Rubio, B., Salvador-Castineira, P., Simutkin, V., Tarifeno-Saldivia, A., Tolosa-Delgado, A., Vos, A., and Helsinki Institute of Physics

Subjects
PROBABILITIES, PRECURSORS, Nuclear Theory, ISOTOPES, HALF-LIVES, IGISOL, Nuclear Experiment, DECAY, 114 Physical sciences, SYSTEM, REGION
Abstract

Background: beta-delayed multiple neutron emission has been observed for some nuclei with A 100 to test the predictions of theoretical models and simulation tools for the decays of heavy nuclei in the region of very neutron-rich nuclei. In addition the decay properties of these nuclei are fundamental for the understanding of astrophysical nucleosynthesis processes such as the r-process and safety inputs for nuclear reactors. Purpose: To determine for the first time the two-neutron branching ratio the P-2n value for Sb-136 through a direct neutron measurement and to provide precise P-1n values for Sb-136 and Te-136. Method: A pure beam of each isotope of interest was provided by the JYFLTRAP Penning trap at the Ion Guide Isotope Separator On-Line (IGISOL) facility of the University of Jyvaskyla Finland. The purified ions were implanted into a moving tape at the end of the beam line. The detection setup consisted of a plastic scintillator placed right behind the implantation point after the tape to register the beta decays and the BELEN detector based on neutron counters embedded in a polyethylene matrix. The analysis was based on the study of the beta- and neutron-growth-and-decay curves and the beta-one-neutron and beta-two-neutron time correlations which allowed us the determination of the neutron branching ratios. Results: The P-2n value of Sb-136 was found to be 0.14(3)% and the measured P-1n values for Sb-136 and Te-136 were found to be 32.2(15)% and 1.47(6)% respectively. Conclusions: The measured P-2n value is a factor 44 smaller than predicted by the finite-range droplet model plus the quasiparticle random-phase approximation (FRDM+QRPA) model used for r-process calculations.

Published
2018

108. Total absorption γ -ray spectroscopy of the β -delayed neutron emitters I137 and Rb95

Author

Guadilla, V., primary, Tain, J. L., additional, Algora, A., additional, Agramunt, J., additional, Jordan, D., additional, Monserrate, M., additional, Montaner-Pizá, A., additional, Nácher, E., additional, Orrigo, S. E. A., additional, Rubio, B., additional, Valencia, E., additional, Estienne, M., additional, Fallot, M., additional, Le Meur, L., additional, Briz, J. A., additional, Cucoanes, A., additional, Porta, A., additional, Shiba, T., additional, Zakari-Issoufou, A.-A., additional, Sonzogni, A. A., additional, Äystö, J., additional, Eronen, T., additional, Gorelov, D., additional, Hakala, J., additional, Jokinen, A., additional, Kankainen, A., additional, Kolhinen, V. S., additional, Koponen, J., additional, Moore, I. D., additional, Penttilä, H., additional, Pohjalainen, I., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rytkönen, K., additional, Sonnenschein, V., additional, Voss, A., additional, Fraile, L. M., additional, Vedia, V., additional, Ganioğlu, E., additional, Gelletly, W., additional, Lebois, M., additional, Wilson, J. N., additional, and Martinez, T., additional

Published
2019
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111. Total absorption γ -ray spectroscopy of niobium isomers

Author

Guadilla, V., primary, Algora, A., additional, Tain, J. L., additional, Agramunt, J., additional, Äystö, J., additional, Briz, J. A., additional, Cucoanes, A., additional, Eronen, T., additional, Estienne, M., additional, Fallot, M., additional, Fraile, L. M., additional, Ganioğlu, E., additional, Gelletly, W., additional, Gorelov, D., additional, Hakala, J., additional, Jokinen, A., additional, Jordan, D., additional, Kankainen, A., additional, Kolhinen, V., additional, Koponen, J., additional, Lebois, M., additional, Le Meur, L., additional, Martinez, T., additional, Monserrate, M., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nácher, E., additional, Orrigo, S. E. A., additional, Penttilä, H., additional, Pohjalainen, I., additional, Porta, A., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rubio, B., additional, Rytkönen, K., additional, Sarriguren, P., additional, Shiba, T., additional, Sonnenschein, V., additional, Sonzogni, A. A., additional, Valencia, E., additional, Vedia, V., additional, Voss, A., additional, Wilson, J. N., additional, and Zakari-Issoufou, A.-A., additional

Published
2019
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112. Large Impact of the Decay of Niobium Isomers on the Reactor ν¯e Summation Calculations

Author

Guadilla, V., primary, Algora, A., additional, Tain, J. L., additional, Estienne, M., additional, Fallot, M., additional, Sonzogni, A. A., additional, Agramunt, J., additional, Äystö, J., additional, Briz, J. A., additional, Cucoanes, A., additional, Eronen, T., additional, Fraile, L. M., additional, Ganioğlu, E., additional, Gelletly, W., additional, Gorelov, D., additional, Hakala, J., additional, Jokinen, A., additional, Jordan, D., additional, Kankainen, A., additional, Kolhinen, V., additional, Koponen, J., additional, Lebois, M., additional, Le Meur, L., additional, Martinez, T., additional, Monserrate, M., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nácher, E., additional, Orrigo, S. E. A., additional, Penttilä, H., additional, Pohjalainen, I., additional, Porta, A., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rubio, B., additional, Rytkönen, K., additional, Shiba, T., additional, Sonnenschein, V., additional, Valencia, E., additional, Vedia, V., additional, Voss, A., additional, Wilson, J. N., additional, and Zakari-Issoufou, A.-A., additional

Published
2019
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113. Characterization and performance of the DTAS detector

Author

Guadilla, V., primary, Tain, J.L., additional, Algora, A., additional, Agramunt, J., additional, Äystö, J., additional, Briz, J.A., additional, Cucoanes, A., additional, Eronen, T., additional, Estienne, M., additional, Fallot, M., additional, Fraile, L.M., additional, Ganioğlu, E., additional, Gelletly, W., additional, Gorelov, D., additional, Hakala, J., additional, Jokinen, A., additional, Jordan, D., additional, Kankainen, A., additional, Kolhinen, V., additional, Koponen, J., additional, Lebois, M., additional, Le Meur, L., additional, Martinez, T., additional, Monserrate, M., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nácher, E., additional, Orrigo, S.E.A., additional, Penttilä, H., additional, Pohjalainen, I., additional, Porta, A., additional, Reinikainen, J., additional, Reponen, M., additional, Rice, S., additional, Rinta-Antila, S., additional, Rubio, B., additional, Rytkönen, K., additional, Shiba, T., additional, Sonnenschein, V., additional, Sonzogni, A.A., additional, Valencia, E., additional, Vedia, V., additional, Voss, A., additional, Wilson, J.N., additional, and Zakari-Issoufou, A.-A., additional

Published
2018
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114. First isomeric yield ratio measurements by direct ion counting and implications for the angular momentum of the primary fission fragments

Author

Rakopoulos, Vasileios, Lantz, Mattias, Solders, Andreas, Al-Adili, Ali, Mattera, Andrea, Canete, L., Eronen, T., Gorelov, D., Jokinen, A., Kankainen, A., Kolhinen, V. S., Moore, I. D., Nesterenko, D. A., Penttila, H., Pohjalainen, I., Rinta-Antila, S., Simutkin, Vasily, Vilen, M., Voss, A., Pomp, Stephan, Rakopoulos, Vasileios, Lantz, Mattias, Solders, Andreas, Al-Adili, Ali, Mattera, Andrea, Canete, L., Eronen, T., Gorelov, D., Jokinen, A., Kankainen, A., Kolhinen, V. S., Moore, I. D., Nesterenko, D. A., Penttila, H., Pohjalainen, I., Rinta-Antila, S., Simutkin, Vasily, Vilen, M., Voss, A., and Pomp, Stephan

Abstract

We report the first experimental determination of independent isomeric yield ratios using direct ion counting with a Penning trap, which offered such a high resolution in mass that isomeric states could be separated. The measurements were performed at the Ion Guide Isotope Separator On-Line (IGISOL) facility at the University of Jyvaskyla. The isomer production ratios of Ge-81, Y-96,Y-97 Sn-128(,1)30, and Sb-129 in the 25-MeV proton-induced fission of U-na(t) and Th-232 were studied. Three isomeric pairs (Ge-81, Y-96, and Sb-129) were measured for the first time for the U-na(t)(p, f) reaction, while all the reported yield ratios for the Th-232(p, f) reaction were determined for the first time. The comparison of the experimentally determined isomeric yield ratios with data available in the literature shows a reasonable agreement, except for the case of Sn-130 for unspecified reasons. The obtained results were also compared with the GEF model, where good agreement can be noticed in most cases for both reactions. Serious discrepancies can only be observed for the cases of Y-96(,)97 for both reactions. Moreover, based on the isomeric yield ratios, the root-mean-square angular momenta (J(r)(ms)) of the fission fragments after scission were estimated using the TALYS code. The experimentally determined isomeric yield ratios, and consequently the deduced J(rms), for Sn-130 are significantly lower compared to Sn-128 for both fissioning systems. This can be attributed to the more spherical shape of the fragments that contribute to the formation of Sn-130, due to their proximity to the N = 82 shell closure. The values of J(rms) for Sb-129 are higher than Sn-128 for both reactions, despite the same neutron number of both nuclides (N = 78), indicating the odd-Z effect where fission fragments with odd-Z number tend to bear larger angular momentum than even-Z fragments. The isomer production ratio for the isotopes of Sn is more enhanced in the U-na(t)(p, f) reaction than in Th-232

Published
2018
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115. Production of Sn and Sb isotopes in high-energy neutron induced fission of natU

Author

Mattera, Andrea, Pomp, Stephan, Lantz, Mattias, Solders, Andreas, Rakopoulos, Vasileios, Al-Adili, Ali, Penttilä, Heikki, Moore, I.D., Rinta-Antila, S., Eronen, T., Kankainen, A., Gorelov, D., Mattera, Andrea, Pomp, Stephan, Lantz, Mattias, Solders, Andreas, Rakopoulos, Vasileios, Al-Adili, Ali, Penttilä, Heikki, Moore, I.D., Rinta-Antila, S., Eronen, T., Kankainen, A., and Gorelov, D.

Abstract

The first systematic measurement of neutron-induced fission yields has been performed at the upgraded IGISOL-4 facility at the University of Jyvaskyla, Finland. The fission products from high-energy neutron-induced fission of U-nat were stopped in a gas cell filled with helium buffer gas, and were online separated with a dipole magnet. The isobars, with masses in the range A = 128-133, were transported to a tape-implantation station and identified using gamma-spectroscopy. We report here the relative cumulative isotopic yields of tin (Z = 50) and the relative independent isotopic yields of antimony (Z = 51). Isomeric yield ratios were also obtained for five nuclides. The yields of tin show a staggered behaviour around A = 131, not observed in the ENDF/B-VII. 1 evaluation. The yields of antimony also contradict the trend from the evaluation, but are in agreement with a calculation performed using the GEF model that shows the yield increasing with mass in the range A = 128-133.

Published
2018
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116. Measurement of the heaviest beta-delayed 2-neutron emitter : Sb-136

Author

Caballero-Folch, R., Dillmann, I., Tain, J. L., Agramunt, J., Domingo-Pardo, C., Algora, A., Äystö, J., Calvino, F., Canete, L., Cortes, G., Eronen, T., Ganioglu, E., Gelletly, W., Gorelov, D., Guadilla, V., Hakala, J., Jokinen, A., Kankainen, A., Kolhinen, V., Koponen, J., Marta, M., Mendoza, E., Montaner-Pizá, A., Moore, I., Nobs, Ch., Orrigo, S., Penttilä, H., Pohjalainen, I., Reinikainen, J., Riego, A., Rinta-Antila, S., Rubio, B., Salvador-Castineira, P., Simutkin, V., Voss, A., Plompen, A, Hambsch, FJ, Schillebeeckx, P, Mondelaers, W, Heyse, J, Kopecky, S, Siegler, P, Oberstedt, S, and Helsinki Institute of Physics

Subjects
inorganic chemicals, NEUTRON EMISSION, Astrophysics::High Energy Astrophysical Phenomena, biological sciences, Nuclear Theory, technology, industry, and agriculture, Physics::Accelerator Physics, lipids (amino acids, peptides, and proteins), Nuclear Experiment, 114 Physical sciences, SYSTEM
Abstract

The beta-delayed neutron emission probability, P-n, of very exotic nuclei is crucial for the understanding of nuclear structure properties of many isotopes and astrophysical processes such as the rapid neutron capture process (r-process). In addition beta-delayed neutrons are important in a nuclear power reactor operated in a prompt sub-critical, delayed critical condition, as they contribute to the decay heat inducing fission reactions after a shut down. The study of neutron-rich isotopes and the measurement of beta-delayed one-neutron emitters (beta 1n) is possible thanks to the Rare Isotope Beam (RIB) facilities, where radioactive beams allow the production of exotic nuclei of interest, which can be studied and analyzed using specific detection systems. This contribution reports two recent measurements of beta-delayed neutron emitters which allowed the determination of half-lives and the neutron branching ratio of isotopes in the mass region above A = 200 and N > 126, and a second experiment which confirmed Sb-136 as the heaviest double neutron emitter (beta 2n) measured so far. The beta-delayed neutron emission probability, P-n, of very exotic nuclei is crucial for the understanding of nuclear structure properties of many isotopes and astrophysical processes such as the rapid neutron capture process (r-process). In addition beta-delayed neutrons are important in a nuclear power reactor operated in a prompt sub-critical, delayed critical condition, as they contribute to the decay heat inducing fission reactions after a shut down. The study of neutron-rich isotopes and the measurement of beta-delayed one-neutron emitters (beta 1n) is possible thanks to the Rare Isotope Beam (RIB) facilities, where radioactive beams allow the production of exotic nuclei of interest, which can be studied and analyzed using specific detection systems. This contribution reports two recent measurements of beta-delayed neutron emitters which allowed the determination of half-lives and the neutron branching ratio of isotopes in the mass region above A = 200 and N > 126, and a second experiment which confirmed Sb-136 as the heaviest double neutron emitter (beta 2n) measured so far. The beta-delayed neutron emission probability, P-n, of very exotic nuclei is crucial for the understanding of nuclear structure properties of many isotopes and astrophysical processes such as the rapid neutron capture process (r-process). In addition beta-delayed neutrons are important in a nuclear power reactor operated in a prompt sub-critical, delayed critical condition, as they contribute to the decay heat inducing fission reactions after a shut down. The study of neutron-rich isotopes and the measurement of beta-delayed one-neutron emitters (beta 1n) is possible thanks to the Rare Isotope Beam (RIB) facilities, where radioactive beams allow the production of exotic nuclei of interest, which can be studied and analyzed using specific detection systems. This contribution reports two recent measurements of beta-delayed neutron emitters which allowed the determination of half-lives and the neutron branching ratio of isotopes in the mass region above A = 200 and N > 126, and a second experiment which confirmed Sb-136 as the heaviest double neutron emitter (beta 2n) measured so far.

Published
2017

117. Experimental study of Tc 100 β decay with total absorption γ -ray spectroscopy

Author

Guadilla, V., Algora, A., Tain, J.L., Agramunt, J., Jordan, D., Montaner-Pizá, A., Orrigo, S. E. A., Rubio, B., Valencia, E., Suhonen, J., Civitarese, Enrique Osvaldo, Äystö, J., Briz, J. A., Cucoanes, A., Eronen, T., Estienne, M., Fallot, M., Fraile, L.M., Ganioglu, E., Gelletly, W., Gorelov, D., Hakala, J., Jokinen, A., Kankainen, A., Kolhinen, V., Koponen, J., Lebois, M., Martinez, T., Monserrate, M., Moore, I., Nácher, E., Penttilä, H., Pohjalainen, I., Porta, A., Reinikainen, J., Reponen, M., Rinta-Antila, S., Rytkönen, K., Shiba, T., Sonnenschein, V., Sonzogni, A. A., Vedia, V., Voss, A., Wilson, J. N., and Zakari-Issoufou, A.-A.

Subjects
Astronomía, purl.org/becyt/ford/1 [https], Matrix elements, Ciencias Físicas, Física, Beta decay, Beta decay transitions, purl.org/becyt/ford/1.3 [https], CIENCIAS NATURALES Y EXACTAS, Ciencias Exactas
Abstract

The β decay of 100Tc has been studied by using the total absorption γ-ray spectroscopy technique at the Ion Guide Isotope Separator On-Line facility in Jyväskylä. In this work the new Decay Total Absorption γ-ray Spectrometer in coincidence with a cylindrical plastic β detector has been employed. The β intensity to the ground state obtained from the analysis is in good agreement with previous high-resolution measurements. However, differences in the feeding to the first-excited state as well as weak feeding to a new level at high excitation energy have been deduced from this experiment. Theoretical calculations performed in the quasiparticle random-phase approximation framework are also reported. Comparison of these calculations with our measurement serves as a benchmark for calculations of the double β decay of 100Mo., Facultad de Ciencias Exactas

Published
2017

118. Experimental study of $^{100}$Tc $\beta$ decay with total absorption $\gamma$-ray spectroscopy

Author

Guadilla, V., Algora, A., Tain, J.L., Agramunt, J., Jordan, D., Montaner-Pizá, A., Orrigo, S.E.A., Rubio, B., Valencia, E., Suhonen, J., Civitarese, O., Äystö, J., Briz, J.A., Cucoanes, A., Eronen, T., Estienne, M., Fallot, M., Fraile, L.M., Ganioglu, E., Gelletly, W., Gorelov, D., Hakala, J., Jokinen, A., Kankainen, A., Kolhinen, V., Koponen, J., Lebois, M., Martinez, T., Monserrate, M., Moore, I., Nácher, E., Penttilä, H., Pohjalainen, I., Porta, A., Reinikainen, J., Reponen, M., Rinta-Antila, S., Rytkönen, K., Shiba, T., Sonnenschein, V., Sonzogni, A.A., Vedia, V., Voss, A., Wilson, J.N., Zakari-Issoufou, A.-A, Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique subatomique et des technologies associées ( SUBATECH ), IMT Atlantique Bretagne-Pays de la Loire ( IMT Atlantique ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Nantes ( UN ), Institut de Physique Nucléaire d'Orsay ( IPNO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
density, molybdenum: double-beta decay, excited state: energy, total-absorption counter, random phase approximation: quasiparticle, technetium: semileptonic decay, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], benchmark, efficiency, gamma ray, ground state, spectrometer, branching ratio, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], numerical calculations, phonon, ruthenium, Monte Carlo, experimental results
Abstract

International audience; The β decay of Tc100 has been studied by using the total absorption γ-ray spectroscopy technique at the Ion Guide Isotope Separator On-Line facility in Jyväskylä. In this work the new Decay Total Absorption γ-ray Spectrometer in coincidence with a cylindrical plastic β detector has been employed. The β intensity to the ground state obtained from the analysis is in good agreement with previous high-resolution measurements. However, differences in the feeding to the first-excited state as well as weak feeding to a new level at high excitation energy have been deduced from this experiment. Theoretical calculations performed in the quasiparticle random-phase approximation framework are also reported. Comparison of these calculations with our measurement serves as a benchmark for calculations of the double β decay of Mo100.

Published
2017

119. Precise measurements of half-lives and branching ratios for the $ \beta$ mirror transitions in the decay of $^{23}$Mg and $^{27}$Si

Author

Magron, C., Alfaurt, Ph., Blank, B., Daudin, L., Eronen, T., Gerbaux, M., Giovinazzo, J., Gorelov, D., Grévy, S., Guérin, H., Hakala, J., Kolhinen, V.S., Koponen, J., Kurtukian Nieto, T., Moore, I.D., Penttilä, H., Pohjalainen, I., Reinikainen, J., Reponen, M., Rinta-Antila, S., Roche, M., De Roubin, A., Smirnova, N., Thomas, B., Voss, A., Xayavong, L., Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; Half-lives and branching ratios for the two mirror $ \beta$ decays of$^{23}$Mg and$^{27}$Si have been measured at the University of Jyväskylä with the IGISOL facility. The results obtained, $ T_{1/2}=11.303(3)$ s and $ T_{1/2}= 4.112(2)$ s for the half-lives of$^{23}$Mg and$^{27}$Si , respectively, are 7 and 8 times more precise than the averages of previous measurements. The values obtained for the super-allowed branching ratios of$^{23}$Mg and$^{27}$Si are $ B.R.=92.18(8)\%$ and $ B.R.=99.74(2)\%$ , respectively. The result for$^{23}$Mg is three times more precise than the average of the previous measurements, while for$^{27}$Si the precision has not been improved, the average of the previous measurements being already very precise. Isospin-symmetry-breaking corrections have been calculated for the two nuclei to determine the corrected $ {F}t$ value.

Published
2017

120. Independent fission yields with JYFLTRAP

Author

Penttilä, H., Äystö, J., Elomaa, V.-V., Eronen, T., Gorelov, D., Hager, U., Hakala, J., Jokinen, A., Kankainen, A., Karvonen, P., Kessler, T., Moore, I., Rahaman, S., Rinta-Antila, S., Rubchenya, V., and Sonoda, T.

Published
2007
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121. First determination of β -delayed multiple neutron emission beyond A=100 through direct neutron measurement: The P2n value of Sb136

Author

Caballero-Folch, R., primary, Dillmann, I., additional, Agramunt, J., additional, Taín, J. L., additional, Algora, A., additional, Äystö, J., additional, Calviño, F., additional, Canete, L., additional, Cortès, G., additional, Domingo-Pardo, C., additional, Eronen, T., additional, Ganioglu, E., additional, Gelletly, W., additional, Gorelov, D., additional, Guadilla, V., additional, Hakala, J., additional, Jokinen, A., additional, Kankainen, A., additional, Kolhinen, V., additional, Koponen, J., additional, Marta, M., additional, Mendoza, E., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nobs, C. R., additional, Orrigo, S. E. A., additional, Penttilä, H., additional, Pohjalainen, I., additional, Reinikainen, J., additional, Riego, A., additional, Rinta-Antila, S., additional, Rubio, B., additional, Salvador-Castiñeira, P., additional, Simutkin, V., additional, Tarifeño-Saldivia, A., additional, Tolosa-Delgado, A., additional, and Voss, A., additional

Published
2018
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122. First isomeric yield ratio measurements by direct ion counting and implications for the angular momentum of the primary fission fragments

Author

Rakopoulos, V., primary, Lantz, M., additional, Solders, A., additional, Al-Adili, A., additional, Mattera, A., additional, Canete, L., additional, Eronen, T., additional, Gorelov, D., additional, Jokinen, A., additional, Kankainen, A., additional, Kolhinen, V. S., additional, Moore, I. D., additional, Nesterenko, D. A., additional, Penttilä, H., additional, Pohjalainen, I., additional, Rinta-Antila, S., additional, Simutkin, V., additional, Vilén, M., additional, Voss, A., additional, and Pomp, S., additional

Published
2018
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123. Experimental study of the effective nucleon-nucleon interaction using the F21(d,p)F22 reaction

Author

Chen, J., primary, Hoffman, C. R., additional, Ahn, T., additional, Auranen, K., additional, Avila, M. L., additional, Back, B. B., additional, Bardayan, D. W., additional, Blankstein, D., additional, Copp, P., additional, Gorelov, D., additional, Kay, B. P., additional, Kuvin, S. A., additional, Lai, J. P., additional, McNeel, D. G., additional, O'Malley, P. D., additional, Rogers, A. M., additional, Santiago-Gonzalez, D., additional, Schiffer, J. P., additional, Sethi, J., additional, Talwar, R., additional, and Winkelbauer, J. R., additional

Published
2018
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124. Precision Mass Measurements of Neutron-Rich Neodymium and Samarium Isotopes and Their Role in Understanding Rare-Earth Peak Formation

Author

Orford, R., primary, Vassh, N., additional, Clark, J. A., additional, McLaughlin, G. C., additional, Mumpower, M. R., additional, Savard, G., additional, Surman, R., additional, Aprahamian, A., additional, Buchinger, F., additional, Burkey, M. T., additional, Gorelov, D. A., additional, Hirsh, T. Y., additional, Klimes, J. W., additional, Morgan, G. E., additional, Nystrom, A., additional, and Sharma, K. S., additional

Published
2018
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125. Masses and β -Decay Spectroscopy of Neutron-Rich Odd-Odd Eu160,162 Nuclei: Evidence for a Subshell Gap with Large Deformation at N=98

Author

Hartley, D. J., primary, Kondev, F. G., additional, Orford, R., additional, Clark, J. A., additional, Savard, G., additional, Ayangeakaa, A. D., additional, Bottoni, S., additional, Buchinger, F., additional, Burkey, M. T., additional, Carpenter, M. P., additional, Copp, P., additional, Gorelov, D. A., additional, Hicks, K., additional, Hoffman, C. R., additional, Hu, C., additional, Janssens, R. V. F., additional, Klimes, J. W., additional, Lauritsen, T., additional, Sethi, J., additional, Seweryniak, D., additional, Sharma, K. S., additional, Zhang, H., additional, Zhu, S., additional, and Zhu, Y., additional

Published
2018
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126. Production of Sn and Sb isotopes in high-energy neutron-induced fission of natU

Author

Mattera, A., primary, Pomp, S., additional, Lantz, M., additional, Rakopoulos, V., additional, Solders, A., additional, Al-Adili, A., additional, Penttilä, H., additional, Moore, I. D., additional, Rinta-Antila, S., additional, Eronen, T., additional, Kankainen, A., additional, Pohjalainen, I., additional, Gorelov, D., additional, Canete, L., additional, Nesterenko, D., additional, Vilén, M., additional, and Äystö, J., additional

Published
2018
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130. First evidence of multiple ß-delayed neutron emission for isotopes with A > 100

Author

Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. NERG - Grup de Recerca d'Enginyeria Nuclear, Caballero-Folch, R., Dillmann, I., Agramunt Ros, Jorge, Tan, J.L., Domingo Pardo, César, Äystö, J., Calviño Tavares, Francisco, Canete, L., Eronen, T., Ganioglu, E., Gelletly, W., Gorelov, D., Guadilla, V., Hakala, J., Jokinen, A., Kankainen, A., Kolhinen, V.S., Koponen, J., Marta, M., Mendoza Cembrano, Emilio, Montaner Piza, A., Moore, I., Nobs, Ch., Orrigo, S., Penttila, H., Pohjalainen, I., Reinikainen, J., Riego Pérez, Albert, Rinta-Antila, S., Rubio, B., Salvador Castiñeira, Paula Genoveva, Simutkin, V., Voss, A., Cortés Rossell, Guillem Pere, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. NERG - Grup de Recerca d'Enginyeria Nuclear, Caballero-Folch, R., Dillmann, I., Agramunt Ros, Jorge, Tan, J.L., Domingo Pardo, César, Äystö, J., Calviño Tavares, Francisco, Canete, L., Eronen, T., Ganioglu, E., Gelletly, W., Gorelov, D., Guadilla, V., Hakala, J., Jokinen, A., Kankainen, A., Kolhinen, V.S., Koponen, J., Marta, M., Mendoza Cembrano, Emilio, Montaner Piza, A., Moore, I., Nobs, Ch., Orrigo, S., Penttila, H., Pohjalainen, I., Reinikainen, J., Riego Pérez, Albert, Rinta-Antila, S., Rubio, B., Salvador Castiñeira, Paula Genoveva, Simutkin, V., Voss, A., and Cortés Rossell, Guillem Pere

Abstract

The beta-delayed neutron emission probability, P-n, of very neutron-rich nuclei allows us to achieve a better understanding of the nuclear structure above the neutron separation energy, S-n. The emission of neutrons can become the dominant decay process in neutron-rich astrophysical phenomena such as the rapid neutron capture process (r-process). There are around 600 accessible isotopes for which beta-delayed one-neutron emission (beta 1n) is energetically allowed, but the branching ratio has only been determined for about one third of them. beta 1n decays have been experimentally measured up to the mass A similar to 1 5 0, plus a single measurement of Tl-210. Concerning two-neutron emitters (beta 2n), similar to 3 0 0 isotopes are accessible and only 24 have been measured so far up to the mass A = 100. In this contribution, we report recent experiments which allowed the measurement of beta 1n emitters for masses beyond A > 200 and N > 1 2 6 and identified the heaviest beta 2n emitter measured so far, Sb-136., Postprint (published version)

Published
2017

131. Characterization of a cylindrical plastic ��-detector with Monte Carlo simulations of optical photons

Author

Guadilla, V., Algora, A., Tain, J. L., Agramunt, J., ��yst��, J., Briz, J. A., Cucoanes, A., Eronen, T., Estienne, M., Fallot, M., Fraile, L. M., Ganioglu, E., Gelletly, W., Gorelov, D., Hakala, J., Jokinen, A., Jordan, D., Kankainen, A., Kolhinen, V., Koponen, J., Lebois, M., Martinez, T., Monserrate, M., Montaner-Piz��, A., Moore, I., N��cher, E., Orrigo, S. E. A., Penttil��, H., Pohjalainen, I., Porta, A., Reinikainen, J., Reponen, M., Rinta-Antila, S., Rubio, B., Rytk��nen, K., Shiba, T., Sonnenschein, V., Valencia, E., Vedia, V., Voss, A., Wilson, J. N., and Zakari-Issoufou, A. -A.

Subjects
FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex)
Abstract

In this work we report on the Monte Carlo study performed to understand and reproduce experimental measurements of a new plastic \b{eta}-detector with cylindrical geometry. Since energy deposition simulations differ from the experimental measurements for such a geometry, we show how the simulation of production and transport of optical photons does allow one to obtain the shapes of the experimental spectra. Moreover, taking into account the computational effort associated with this kind of simulation, we develop a method to convert the simulations of energy deposited into light collected, depending only on the interaction point in the detector. This method represents a useful solution when extensive simulations have to be done, as in the case of the calculation of the response function of the spectrometer in a total absorption ��-ray spectroscopy analysis., submitted to Nuclear Instruments and Methods A

Published
2016
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132. Experimental study of Tc100 β decay with total absorption γ -ray spectroscopy

Author

Guadilla, V., primary, Algora, A., additional, Tain, J. L., additional, Agramunt, J., additional, Jordan, D., additional, Montaner-Pizá, A., additional, Orrigo, S. E. A., additional, Rubio, B., additional, Valencia, E., additional, Suhonen, J., additional, Civitarese, O., additional, Äystö, J., additional, Briz, J. A., additional, Cucoanes, A., additional, Eronen, T., additional, Estienne, M., additional, Fallot, M., additional, Fraile, L. M., additional, Ganioğlu, E., additional, Gelletly, W., additional, Gorelov, D., additional, Hakala, J., additional, Jokinen, A., additional, Kankainen, A., additional, Kolhinen, V., additional, Koponen, J., additional, Lebois, M., additional, Martinez, T., additional, Monserrate, M., additional, Moore, I., additional, Nácher, E., additional, Penttilä, H., additional, Pohjalainen, I., additional, Porta, A., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rytkönen, K., additional, Shiba, T., additional, Sonnenschein, V., additional, Sonzogni, A. A., additional, Vedia, V., additional, Voss, A., additional, Wilson, J. N., additional, and Zakari-Issoufou, A.-A., additional

Published
2017
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133. Precise measurements of half-lives and branching ratios for the $ \beta$ β mirror transitions in the decay of 23Mg and 27Si

Author

Magron, C., primary, Alfaurt, Ph., additional, Blank, B., additional, Daudin, L., additional, Eronen, T., additional, Gerbaux, M., additional, Giovinazzo, J., additional, Gorelov, D., additional, Grévy, S., additional, Guérin, H., additional, Hakala, J., additional, Kolhinen, V. S., additional, Koponen, J., additional, Kurtukian Nieto, T., additional, Moore, I. D., additional, Penttilä, H., additional, Pohjalainen, I., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Roche, M., additional, de Roubin, A., additional, Smirnova, N., additional, Thomas, B., additional, Voss, A., additional, and Xayavong, L., additional

Published
2017
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134. r Process (n, \(\gamma \)) Rate Constraints from the \(\gamma \) Emission of Neutron Unbound States in \(\beta \)-Decay

Author

Tain, J. L., primary, Guadilla, V., additional, Valencia, E., additional, Algora, A., additional, Zakari-Issoufou, A.-A., additional, Rice, S., additional, Agramunt, J., additional, Äystö, J., additional, Batist, L., additional, Bowry, M., additional, Briz, J. A., additional, Bui, V. M., additional, Caballero-Folch, R., additional, Cano-Ott, D., additional, Cucoanes, A., additional, Elomaa, V.-V., additional, Eronen, T., additional, Estevez, E., additional, Estienne, M., additional, Fallot, M., additional, Farrelly, G. F., additional, Fraile, L. M., additional, Ganioglu, E., additional, Garcia, A. R., additional, Gelletly, W., additional, Gómez-Hornillos, B., additional, Gorelov, D., additional, Gorlychev, V., additional, Hakala, J., additional, Jokinen, A., additional, Jordan, M. D., additional, Kankainen, A., additional, Kolhinen, V. S., additional, Kondev, F. G., additional, Koponen, J., additional, Lebois, M., additional, Le Meur, L., additional, Martínez, T., additional, Mason, P., additional, Mendoza, E., additional, Monserrate, M., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nacher, E., additional, Orrigo, S. E. A., additional, Penttilä, H., additional, Podolyák, Zs., additional, Pohjalainen, I., additional, Porta, A., additional, Regan, P., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rissanen, J., additional, Rubio, B., additional, Rytkönen, K., additional, Shiba, T., additional, Sonnenschein, V., additional, Sonzogni, A. A., additional, Vedia, V., additional, Voss, A., additional, and Wilson, J. N., additional

Published
2017
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135. Measurement of the heaviestβ-delayed 2-neutron emitter:136Sb

Author

Caballero-Folch, R., primary, Dillmann, I., additional, Taín, J.L., additional, Agramunt, J., additional, Domingo-Pardo, C., additional, Algora, A., additional, Äystö, J., additional, Calviño, F., additional, Canete, L., additional, Cortès, G., additional, Eronen, T., additional, Ganioglu, E., additional, Gelletly, W., additional, Gorelov, D., additional, Guadilla, V., additional, Hakala, J., additional, Jokinen, A., additional, Kankainen, A., additional, Kolhinen, V., additional, Koponen, J., additional, Marta, M., additional, Mendoza, E., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nobs, Ch., additional, Orrigo, S., additional, Penttilä, H., additional, Pohjalainen, I., additional, Reinikainen, J., additional, Riego, A., additional, Rinta-Antila, S., additional, Rubio, B., additional, Salvador-Castiñeira, P., additional, Simutkin, V., additional, and Voss, A., additional

Published
2017
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137. First Evidence of Multiple $\beta $-delayed Neutron Emission for Isotopes with $A>100$

Author

Caballero-Folch, R., primary, Dillmann, I., additional, Agramunt, J., additional, Taín, J.L., additional, Domingo-Pardo, C., additional, Algora, A., additional, Äysto, J., additional, Calvino, F., additional, Canete, L., additional, Cortès, G., additional, Eronen, T., additional, Ganioglu, E., additional, Gelletly, W., additional, Gorelov, D., additional, Guadilla, V., additional, Hakala, J., additional, Jokinen, A., additional, Kankainen, A., additional, Kolhinen, V., additional, Koponen, J., additional, Marta, M., additional, Mendoza, E., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nobs, Ch., additional, Orrigo, S., additional, Penttilä, H., additional, Pohjalainen, I., additional, Reinikainen, J., additional, Riego, A., additional, Rinta-Antila, S., additional, Rubio, B., additional, Salvador-Castineira, P., additional, Simutkin, V., additional, and Voss, A., additional

Published
2017
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138. Study of the $\beta $ Decay of Fission Products with the DTAS Detector

Author

Guadilla, V., primary, Algora, A., additional, Tain, J.L., additional, Agramunt, J., additional, Äystö, J., additional, Briz, J.A., additional, Cucoanes, A., additional, Eronen, T., additional, Estienne, M., additional, Fallot, M., additional, Fraile, L.M., additional, Ganioğlu, E., additional, Gelletly, W., additional, Gorelov, D., additional, Hakala, J., additional, Jokinen, A., additional, Jordan, D., additional, Kankainen, A., additional, Kolhinen, V., additional, Koponen, J., additional, Lebois, M., additional, Martinez, T., additional, Monserrate, M., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nácher, E., additional, Orrigo, S.E.A., additional, Penttilä, H., additional, Pohjalainen, I., additional, Porta, A., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rubio, B., additional, Rytkönen, K., additional, Shiba, T., additional, Sonnenschein, V., additional, Sonzogni, A.A., additional, Valencia, E., additional, Vedia, V., additional, Voss, A., additional, Wilson, J.N., additional, and Zakari-Issoufou, A.-A., additional

Published
2017
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142. Fission yield measurements at IGISOL

Author

Lantz, Mattias, Al-Adili, Ali, Gorelov, D., Jokinen, A., Kolhinen, V. S., Mattera, Andrea, Moore, I., Penttila, H., Pomp, Stephan, Prokofiev, Alexander V., Rakopoulos, Vasileios, Rinta-Antila, S., Simutkin, Vasily, Solders, Andreas, Lantz, Mattias, Al-Adili, Ali, Gorelov, D., Jokinen, A., Kolhinen, V. S., Mattera, Andrea, Moore, I., Penttila, H., Pomp, Stephan, Prokofiev, Alexander V., Rakopoulos, Vasileios, Rinta-Antila, S., Simutkin, Vasily, and Solders, Andreas

Abstract

The fission product yields are an important characteristic of the fission process. In fundamental physics, knowledge of the yield distributions is needed to better understand the fission process. For nuclear energy applications good knowledge of neutron-induced fission-product yields is important for the safe and efficient operation of nuclear power plants. With the Ion Guide Isotope Separator On-Line (IGISOL) technique, products of nuclear reactions are stopped in a buffer gas and then extracted and separated by mass. Thanks to the high resolving power of the JYFLTRAP Penning trap, at University of Jyvaskyla, fission products can be isobarically separated, making it possible to measure relative independent fission yields. In some cases it is even possible to resolve isomeric states from the ground state, permitting measurements of isomeric yield ratios. So far the reactions U(p,f) and Th(p,f) have been studied using the IGISOL-JYFLTRAP facility. Recently, a neutron converter target has been developed utilizing the Be(p,xn) reaction. We here present the IGISOL-technique for fission yield measurements and some of the results from the measurements on proton induced fission. We also present the development of the neutron converter target, the characterization of the neutron field and the first tests with neutron-induced fission.

Published
2016
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145. Measurement of the energy spectrum from the neutron source p lanned for IGISOL

Author

Mattera, A, Bedogni, R, Rakopoulos, V, Lantz, M, Pomp, S, Solders, A, Al-Adili, A, Andersson, P, Hjalmarsson, A, Valldor-Blücher, B, Prokofiev, A, Passoth, E, Gentile, A, Bortot, D, Esposito, A, Introini, M V, Pola, A, Penttilä, H, Gorelov, D, and Rinta-Antila, S

Subjects
Nuclear Theory, Nuclear Physics - Experiment, Nuclear Experiment
Abstract

We report on the characterisation measurements of the energ y spectra from a Be (p,xn) neutron source to be installed at the IGISOL-JYFLTRA P facility for studies of neutron-induced independent fission yields. The measurements were performed at The Svedberg Laboratory (Uppsala, Sweden), during 50 hours of beam-time in June, 2012. A 30 MeV p roton beam impinged on a mock-up of the proton-neutron converter; this was a 5 mm-thick beryllium disc inserted in an aluminium holder, with a 1-cm t hick layer of cool- ing water on the backside. The geometry of the mock-up has bee n chosen to reproduce the one that will be used as the IGISOL-JYFLTRAP so urce. During the experiment, two configurations for the neutron so urce have been used: a fast neutron field, produced using the bare target; an d a moderated field, obtained adding a 10 cm-thick Polyethylene block after the t arget assembly. The neutron fields have been measured using an Extended Range Bonner Sphere Spectrometer (ERBSS), able to simultaneously determine al l energy compo- nents of the spectrum from thermal energies up to tens of MeV. In addition to that, a Time of Flight (TOF) system was used to study more in detail the high-energy component of the neutron fields (E & 5 MeV).

Published
2014

146. Target thickness dependence of the Be(p,xn) neutron energy spectrum

Author

Lunardi, S., Rakopoulos, V., Lantz, M., Andersson, P., Hjalmarsson, A., Mattera, A., Pomp, S., Solders, A., Valldor Blücher, J., Gorelov, D., Penttilä, H., Rinta Antila, S., Bedogni, R., Bortot, Davide, Esposito, A., Gentile, A., Passoth, E., Prokofiev, A. V., Introini, MARIA VITTORIA, Pola, Andrea, Bizzeti, P. G., Bucci, C., Chiari, M., Dainese, A., Di Nezza, P., Menegazzo, R., Nannini, A., Signorini, C., and Valiente Dobon, J. J.

Subjects
Physics, Proton, QC1-999, neutrons, Scintillator, The Svedberg Laboratory, Neutron temperature, Spectral line, spectrum, Nuclear physics, Subatomär fysik, Data acquisition, nuclear physics, Subatomic Physics, Neutron, Beam (structure), energy
Abstract

We report on the current status of the analysis of an experiment performed at The Svedberg Laboratory, with the aim of investigating the produced neutron field by Be(p,xn) converters of three different thicknesses with a 30 MeV proton beam. The neutron energy spectra were measured with the Time of Flight technique using a BC-501 liquid scintillator with good n-γ Pulse Shape Discrimination properties, while the detected events were recorded simultaneously by two Data AcQuisition systems. In this paper, we present the experimental setup, the analysis technique and some preliminary results. AlFONS

Published
2014

147. Analysis of the Four Rod Crab Cavity for HL-LHC

Author

Hall, B, Ambattu, P K, Burt, G, Dexter, A C, Doherty, D, Lingwood, C, Calaga, R, Jensen, E, Rimmer, R, Wang, H, Gorelov, D, Grimm, T, Schnabel, E, Goudket, P, and Hill, C

Subjects
Crab cavities [4], Coordination and Communication [4.1], Accelerators and Storage Rings
Published
2014

148. Development of a neutron converter for studies of neutron-induced fission fragments at the IGISOL facility

Author

Lantz, M, Gorelov, D, Al-Adili, A, Jokinen, A, Kolhinen, V, Mattera, A, Rinta-Antila, S, Penttilä, H, Pomp, S, Rakoupoulos, V, Simutkin, V, and Solders, A

Subjects
Nuclear Physics - Experiment
Abstract

The ERINDA funded scientific visit has enabled the groups at U ppsala Uni- versity and University of Jyväskylä to work closer together on the design of a neutron converter that will be used as neutron source in fissi on yield studies at the IGISOL-JYFLTRAP facility at the University of Jyväsk ylä. The design is based on simulations with both deterministic codes and Mo nte Carlo codes, and an ERINDA funded benchmark measurement. In order to obta in a com- petitive count rate the fission targets will be placed very cl ose to the neutron converter. The intention is to have a flexible design that wil l enable neutron fields with different energy distributions. In this report t he progression and the present status of the design work will be discussed, togethe r with an outlook of the future plans

Published
2014

149. Independent fission yield measurements with JYFLTRAP

Author

Gorelov, D. A., Eronen, T., Hakala, J., Jokinen, A., Kankainen, A., Kolhinen, V. S., Lantz, M., Mattera, A., Moore, I. D., Penttila, H., Pohjalainen, I., Pomp, S., Reponen, M., Rinta-Antila, S., Rissanen, J., Rubchenya, V., Saastamoinen, A., Simutkin, V., Solders, A., Sonnenschein, V., and Aysto, J.

Subjects
ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика [ЭБ БГУ]
Abstract

Section II. Experimental Investigations of Nuclear Reactions Mechanisms

Published
2014

150. Measurement of the isomeric yield ratios of fission products with JYFLTRAP

Author

Gorelov, D, Al-Adili, A, Hakala, J, Jokinen, A, Kolhinen, V S, Koponen, J, Lantz, M, Matteram, A, Moore, I, Penttilä, H, Pohjalainen, I, Pomp, S, Rakopoulos, V, Reponen, M, Rinta-Antilav, S, Schonnenschein, V, Simutkin, V, Solders, A, Voss, A, and Äystö, J

Subjects
Nuclear Physics - Experiment
Abstract

Several isomeric yield ratios of fission products in 25 MeV pr oton-induced fis- sion of 238 U were measured recently at the JYFLTRAP facility. The ion-g uide separator on-line method was utilized to produce radioacti ve ions. The dou- ble Penning-trap mass spectrometer was used to separate iso meric and ground states by their masses. To verify the new experimental techn ique γ -spectro- scopy method was used to obtain the same isomeric ratios.

Published
2014

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