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38 results on '"Söderström Pär-anders"'

1. Isomeric Lifetime Measurement in the Neutron-rich 189Ta

Author

Alhomaidhi Sultan, Sahin Elif, Werner Volker, Jolie Jan, Regan Patrick, Pietralla Norbert, Gerl Jürgen, Górska Magdalena, Benzoni Giovanna, Mistry Andrew K., Hubbard Nicolas, Aggez Guler, Albers Helena M., Arici Tugba, Armstrong Michael, Banerjee Akashrup, Das Biswarup, Davinson Thomas, Hall Oscar, Kojouharov Ivan, Koseoglou Pavlos, Mikolajczuk Michal, Podolyák Zsolt, Polettini Marta, Rudigier Matthias, Schaffner Henning, Wollersheim Hans-Jürgen, Yaneva Aleksandrina, Boutachkov Plamen, Dickel Timo, Haettner Emma, Heggen Henning, Hornung Christine, Knöbel Ronja, Kostyleva Daria, Kurz Nikolaus, Kuzminchuk Natalia, Mukha Ivan, Pietri Stephane, Plaß Wolfgang, Scheidenberger Christoph, Tanaka Yoshiki, Weick Helmut, Ahmed Usama, Aktas Özge, Algora Alejandro, Appleton Corrigan, Blazhev Andrey, Bruce Alison, Cederwall Bo, Chishti Muhammad M. R., Cortes Martha L., Crespi Fabio, Dobon Jose J., Doncel Maria, Ertoprak Aysegül, Esmaylzadeh Arwin, Expósito Marcos L., Fraile Luis M., García Jaime B., Gottardo Andrea, Ha Jeongsu, Jazrawi Shaheen, John Philipp R., Jones Calum, Karayonchev Vasil, Kern Ralph, Knafla Lukas, Kosir Gregor, Lozeva Radomira, Mengoni Daniele, Mertzimekis Theo J., Million Bénédicte, Morales Anabel, Murias Javier R., Orrigo Sonja E. A., Pellumaj Julgen, Pelonis Stefanos, Petrović Jana, Pigliapoco Sara, Quintana Begoña, Recchia Francesco, Rezynkina Kseniia, Sexton Lewis, Singh Nara, Söderström Pär-Anders, Sood Arshiya, Vasileiou Polytimos, Vesic Jelena, Wiederhold Johannes, zhang guangxin, Zidarova Radostina, and Zyriliou Aikaterini

Subjects
Physics, QC1-999
Abstract

Isomeric states of the neutron-rich isotope 18973Ta116 were populated via fragmentation of a primary beam of 208Pb ions at 1 GeV/u impinging on a 9Be target at GSI, Darmstadt, Germany. The isotopes of interest were separated, identified and delivered to the DESPEC setup. Two isomers were deduced in 189Ta116 and their lifetimes were measured based on the γ-ray time distributions.

Published
2023
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2. A Comprehensive Characterization of the Neutron Fields Produced by the Apollon Petawatt Laser

Author

Lelièvre, Ronan, Yao, Weipeng, Waltenspiel, Tessa, Cohen, Itamar, Beck, Arie, Cohen, Erez, Michaeli, David, Pomerantz, Ishay, Gautier, Donald Cort, Trompier, François, Ducasse, Quentin, Koseoglou, Pavlos, Söderström, Pär-Anders, Mathieu, François, Allaoua, Amokrane, and Fuchs, Julien

Subjects
Physics - Accelerator Physics, High Energy Physics - Experiment, Nuclear Experiment
Abstract

Since two decades, laser-driven neutron emissions are studied as they represent a complementary source to conventional neutron sources, with further more different characteristics (i.e. shorter bunch duration and higher number of neutrons per bunch). We report here a global, thorough characterization of the neutron fields produced at the Apollon laser facility using the secondary laser beam (F2). A Double Plasma Mirror (DPM) was used to improve the temporal contrast of the laser which delivers pulses of 24 fs duration, a mean on-target energy of ~10 J and up to 1 shot/min. The interaction of the laser with thin targets (few tens or hundreds of nm) in ultra-high conditions produced enhanced proton beams (up to 35 MeV), which were then used to generate neutrons via the pitcher-catcher technique. The characterization of these neutron emissions is presented, with results obtained from both simulations and measurements using several diagnostics (activation samples, bubble detectors and Time-of-Flight detectors), leading to a neutron yield of ~$4.10^{7}$ neutrons/shot. Similar neutron emissions were observed during shots with and without DPM, while fewer X-rays are produced when the DPM is used, making this tool interesting to adjust the neutrons/X-rays ratio for some applications like combined neutron/X-ray radiography.

Published
2023

3. Isotope-production cross sections of residual nuclei in proton- and deuteron-induced reactions on 93Zr at 50 MeV/u

Author

Nakano Keita, Watanabe Yukinobu, Kawase Shoichiro, Wang He, Otsu Hideaki, Sakurai Hiroyoshi, Chiga Nobuyuki, Suwa Junki, Sumikama Toshiyuki, Takeuchi Satoshi, Nakamura Takashi, Chikaato Kazuya, Takechi Maya, Koyama Shunpei, Soon Ahn Deuk, Baba Hidetada, Chen Sidong, Cortes Martha Liliana, Doornenbal Pieter, Fukuda Naoki, Hirayama Akihiro, Hosoda Ryohei, Isobe Tadaaki, Kawakami Shunsuke, Kondo Yosuke, Kubono Shigeru, Maeda Yukie, Masuoka Shoichiro, Michimasa Shin’ichiro, Murray Ian, Nakajima Ryo, Niikura Megumi, Ozaki Tomoyuki, Saito Atsumi, Saito Takeshi, Sato Hiromi, Shimizu Yohei, Shimoura Susumu, Soudo Yoshiki, Söderström Pär-Anders, Sun Xiaohui, Suzuki Daisuke, Suzuki Hiroshi, Takeda Hiroyuki, Togano Yasuhiro, Tomai Takato, Yamada Hiroki, Yasuda Masahiro, and Yoshida Koichi

Subjects
Physics, QC1-999
Abstract

The isotope-production cross sections in p- and d-induced reactions on 93Zr at approximately 50 MeV/nucleon were measured by using the inverse-kinematics method at RIKEN RI Beam Factory. The measured data were compared with the previous experimental 93Zr + p, d at 105 and 209 MeV/nucleon data. This comparison represents that the isotopic distribution of production cross sections at 51 MeV p-induced reaction is appreciably different from those at 105 and 209 MeV. On the other hand, these three data sets show that the shape of isotopic distribution is similar in the case of the d-induced reaction. Also, the measured production cross sections were compared with the theoretical model calculations with Particle and Heavy Ion Transport code System (PHITS) version 3.10 in order to investigate the reproducibility of the models implemented in PHITS. The calculations well reproduced the experimental data even in such low incident energy, while several discrepancies were still seen as in the p- and d-induced reactions at 105 and 209 MeV/nucleon.

Published
2020
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4. Search for Isovector Valence-Shell Excitations in 140Nd and 142Sm via Coulomb excitation reactions of radioactive ion beams

Author

Kern Ralph, Stegmann Robert, Pietralla Norbert, Rainovski Georgi, Gaffney Liam Paul, Blazhev Andrey, Boukhari Amar, Cederkäll Joakim, Cubiss James, Djongolov Martin, Fransen Christoph, Gladnishki Kalin, Giannopoulos Efstathios, Hess Herbert, Jolie Jan, Karayonchev Vasil, Kaya Levent, Keatings James, Kocheva Diana, Kröll Thorsten, Möller Oliver, O'Neill George, Pakarinen Janne, Reiter Peter, Rosiak Dawid, Scheck Marcus, Snall Jacob, Söderström Pär-Anders, Spagnoletti Pietro, Stoyanova Milena, Thiel Stefan, Vogt Andreas, Warr Nigel, Welker Andree, Werner Volker, Wiederhold Johannes, De Witte Hilde, and Zidarova Radostina

Subjects
Physics, QC1-999
Abstract

Projectile Coulomb excitation experiments were performed at HIE-ISOLDE at CERN with the radioactive ion beams of 140Nd and 142Sm. Ions with an energy of 4:62 MeV/A were impinging on a 1.45 mg/cm2 thick 208Pb target. The γ-rays depopulating the Coulomb-excited states were recorded by the HPGe-array MINIBALL and scattered particles were detected by a double-sided silicon strip detector. Experimental intensities were used for the determination of electromagnetic transition matrix elements. A preliminary result of the B(M1; 2+3 → 2+1) of 140Nd and an upper limit for the case of 142Sm are revealing the main fragments of the proton-neutron mixed-symmetry 2+1;ms states.

Published
2018
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5. Cross sections for nuclide production in proton- and deuteron-induced reactions on 93Nb measured using the inverse kinematics method

Author

Nakano Keita, Watanabe Yukinobu, Kawase Shoichiro, Wang He, Otsu Hideaki, Sakurai Hiroyoshi, Takeuchi Satoshi, Togano Yasuhiro, Nakamura Takashi, Maeda Yukie, Ahn Deuk Soon, Aikawa Masayuki, Araki Shouhei, Chen Sidong, Chiga Nobuyuki, Doornenbal Pieter, Fukuda Naoki, Ichihara Takashi, Isobe Tadaaki, Kawakami Shunsuke, Kin Tadahiro, Kondo Yosuke, Koyama Shunpei, Kubo Toshiyuki, Kubono Shigeru, Kurokawa Meiko, Makinaga Ayano, Matsushita Masafumi, Matsuzaki Teiichiro, Michimasa Shin'ichiro, Momiyama Satoru, Nagamine Shunsuke, Niikura Megumi, Ozaki Tomoyuki, Saito Atsumi, Saito Takeshi, Shiga Yoshiaki, Shikata Mizuki, Shimizu Yohei, Shimoura Susumu, Sumikama Toshiyuki, Söderström Pär-Anders, Suzuki Hiroshi, Takeda Hiroyuki, Taniuchi Ryo, Tsubota Jun'ichi, Watanabe Yasushi, Wimmer Kathrin, Yamamoto Tatsuya, and Yoshida Koichi

Subjects
Physics, QC1-999
Abstract

Isotopic production cross sections were measured for proton- and deuteron-induced reactions on 93Nb by means of the inverse kinematics method at RIKEN Radioactive Isotope Beam Factory. The measured production cross sections of residual nuclei in the reaction 93Nb + p at 113 MeV/u were compared with previous data measured by the conventional activation method in the proton energy range between 46 and 249 MeV. The present inverse kinematics data of four reaction products (90Mo, 90Nb, 88Y, and 86Y) were in good agreement with the data of activation measurement. Also, the model calculations with PHITS describing the intra-nuclear cascade and evaporation processes generally well reproduced the measured isotopic production cross sections.

Published
2017
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6. Cross section measurement of residues produced in proton- and deuteron-induced spallation reactions on 93Zr at 105 MeV/u using the inverse kinematics method

Author

Kawase Shoichiro, Watanabe Yukinobu, Wang He, Otsu Hideaki, Sakurai Hiroyoshi, Takeuchi Satoshi, Togano Yasuhiro, Nakamura Takashi, Maeda Yukie, Ahn Deuk Soon, Aikawa Masayuki, Araki Shouhei, Chen Sidong, Chiga Nobuyuki, Doornenbal Pieter, Fukuda Naoki, Ichihara Takashi, Isobe Tadaaki, Kawakami Shunsuke, Kin Tadahiro, Kondo Yosuke, Koyama Shunpei, Kubo Toshiyuki, Kubono Shigeru, Kurokawa Meiko, Makinaga Ayano, Matsushita Masafumi, Matsuzaki Teiichiro, Michimasa Shin'ichiro, Momiyama Satoru, Nagamine Shunsuke, Nakano Keita, Niikura Megumi, Ozaki Tomoyuki, Saito Atsumi, Saito Takeshi, Shiga Yoshiaki, Shikata Mizuki, Shimizu Yohei, Shimoura Susumu, Sumikama Toshiyuki, Söderström Pär-Anders, Suzuki Hiroshi, Takeda Hiroyuki, Taniuchi Ryo, Tsubota Jun'ichi, Watanabe Yasushi, Wimmer Kathrin, Yamamoto Tatsuya, and Yoshida Koichi

Subjects
Physics, QC1-999
Abstract

Isotopic production cross sections in the proton- and deuteron-induced spallation reactions on 93Zr at an energy of 105 MeV/u were measured in inverse kinematics conditions for the development of realistic nuclear transmutation processes for long-lived fission products (LLFPs) with neutron and light-ion beams. The experimental results were compared to the PHITS calculations describing the intra-nuclear cascade and evaporation processes. Although an overall agreement was obtained, a large overestimation of the production cross sections for the removal of a few nucleons was seen. A clear shell effect associated with the neutron magic number N = 50 was observed in the measured isotopic production yields of Zr and Y isotopes, which can be reproduced reasonably by the PHITS calculation.

Published
2017
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7. Spallation reaction study for fission products in nuclear waste: Cross section measurements for 137Cs, 90Sr and 107Pd on proton and deuteron

Author

Wang He, Otsu Hideaki, Sakurai Hiroyoshi, Ahn DeukSoon, Aikawa Masayuki, Ando Takashi, Araki Shouhei, Chen Sidong, Chiga Nobuyuki, Doornenbal Pieter, Fukuda Naoki, Isobe Tadaaki, Kawakami Shunsuke, Kawase Shoichiro, Kin Tadahiro, Kondo Yosuke, Koyama Shupei, Kubono Shigeru, Maeda Yukie, Makinaga Ayano, Matsushita Masafumi, Matsuzaki Teiichiro, Michimasa Shinichiro, Momiyama Satoru, Nagamine Shunsuke, Nakamura Takashi, Nakano Keita, Niikura Megumi, Ozaki Tomoyuki, Saito Atsumi, Saito Takeshi, Shiga Yoshiaki, Shikata Mizuki, Shimizu Yohei, Shimoura Susumu, Sumikama Toshiyuki, Söderström Pär-Anders, Suzuki Hiroshi, Takeda Hiroyuki, Takeuchi Satoshi, Taniuchi Ryo, Togano Yasuhiro, Tsubota Junichi, Uesaka Meiko, Watanabe Yasushi, Watanabe Yukinobu, Wimmer Kathrin, Yamamoto Tatsuya, and Yoshida Koichi

Subjects
Physics, QC1-999
Abstract

Spallation reactions for the long-lived fission products 137Cs, 90Sr and 107Pd have been studied for the purpose of nuclear waste transmutation. The cross sections on the proton- and deuteron-induced spallation were obtained in inverse kinematics at the RIKEN Radioactive Isotope Beam Factory. Both the target and energy dependences of cross sections have been investigated systematically. and the cross-section differences between the proton and deuteron are found to be larger for lighter fragments. The experimental data are compared with the SPACS semi-empirical parameterization and the PHITS calculations including both the intra-nuclear cascade and evaporation processes.

Published
2017
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8. A γ-Ray Detector Based on a 3” LaBr3:Ce:Sr Crystal With SiPM Readout for 80 keV–16 MeV Energy Range With Position Sensitivity for Doppler Correction

Author

Agnolin, Marco, primary, Di Vita, Davide, additional, Borghi, Giacomo, additional, Carminati, Marco, additional, Camera, Franco, additional, Wieland, Oliver, additional, Million, Bénédicte, additional, Giaz, Agnese, additional, Mihai, Constantin, additional, Turturica, Andrei, additional, Costache, Cristian, additional, Borcea, Ruxandra, additional, Söderström, Pär-Anders, additional, Ban, Rebeca Sara, additional, and Fiorini, Carlo, additional

Published
2023
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9. Development of Neutron Detectors for the Next Generation of Radioactive Ion-Beam Facilities

Author

Söderström, Pär-Anders

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The next generation of radioactive ion beam facilities, which will give experimental access to many exotic nuclei, are presently being developed. These facilities will make it possible to study very short lived exotic nuclei with extreme values of isospin far from the line of beta stability. Such nuclei will be produced with very low cross sections and to study them, new detector arrays are being developed. At the SPIRAL facility in GANIL a neutron detector array, the Neutron Wall, is located. In this work the Neutron Wall has been characterized regarding neutron detection efficiency and discrimination between neutrons and gamma rays. The possibility to increase the efficiency by increasing the high voltage of the photomultiplier tubes has also been studied. For SPIRAL2 a neutron detector array, NEDA, is being developed. NEDA will operate in a high gamma-ray background environment which puts a high demand on the quality of discrimination between neutrons and gamma rays. To increase the quality of the discrimination methods pulse-shape discrimination techniques utilizing digital electronics have been developed and evaluated regarding bit resolution and sampling frequency of the ADC. The conclusion is that an ADC with a bit resolution of 12 bits and a sampling frequency of 100 MS/s is adequate for pulse-shape discrimination of neutrons and gamma rays for a neutron energy range of 0.3-12 MeV., Comment: Licentiate thesis, 67 pages, 28 figures

Published
2009

10. Spallation reaction study for the long-lived fission products in nuclear waste: Cross section measurements for 137Cs, 90Sr and 107Pd using inverse kinematics method

Author

Wang, He, Otsu, Hideaki, Sakurai, Hiroyoshi, Ahn, DeukSoon, Chiga, Nobuyuki, Doornenbal, Pieter, Fukuda, Naoki, Isobe, Tadaaki, Kubo, Toshiyuki, Kubono, Shigeru, Lorusso, Giusseppe, Söderström, Pär-Anders, Suzuki, Hiroshi, Takeda, Hiroyuki, Watanabe, Yasushi, Yoshida, Koichi, Matsuzaki, Teiichiro, Shimizu, Yohei, Sumikama, Toshiyuki, Uesaka, Meiko, Kawase, Shoichiro, Nakano, Keita, Watanabe, Yukinobu, Araki, Shouhei, Kin, Tadahiro, Takeuchi, Satoshi, Togano, Yasuhiro, Nakamura, Takashi, Kondo, Yosuke, Ozaki, Tomoyuki, Saito, Atsumi, Tsubota, Junichi, Aikawa, Masayuki, Makinaga, Ayano, Ando, Takashi, Koyama, Shunpei, Momiyama, Satoru, Nagamine, Shunsuke, Niikura, Megumi, Saito, Takeshi, Taniuchi, Ryo, Wimmer, Kathrin, Kawakami, Shunsuke, Maeda, Yukie, Yamamoto, Tatsuya, Shiga, Yoshiaki, Matsushita, Masafumi, Michimasa, Shin’ichiro, and Shimoura, Susumu

Published
2017
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11. Conceptual design of the early implementation of the NEutron Detector Array (NEDA) with AGATA

Author

Hüyük, Tayfun, Di Nitto, Antonio, Jaworski, Grzegorz, Gadea, Andrés, Javier Valiente-Dobón, José, Nyberg, Johan, Palacz, Marcin, Söderström, Pär-Anders, Jose Aliaga-Varea, Ramon, de Angelis, Giacomo, Ataç, Ayşe, Collado, Javier, Domingo-Pardo, Cesar, Egea, Francisco Javier, Erduran, Nizamettin, Ertürk, Sefa, de France, Gilles, Gadea, Rafael, González, Vicente, Herrero-Bosch, Vicente, Kaşkaş, Ayşe, Modamio, Victor, Moszynski, Marek, Sanchis, Enrique, Triossi, Andrea, and Wadsworth, Robert

Published
2016
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12. Isotope production in proton-, deuteron-, and carbon-induced reactions on Nb 93 at 113 MeV/nucleon

Author

Nakano, Keita, Watanabe, Yukinobu, Kawase, Shoichiro, Wang, He, Otsu, Hideaki, Sakurai, Hiroyoshi, Takeuchi, Satoshi, Togano, Yasuhiro, Nakamura, Takashi, Maeda, Yukie, Ahn, Deuk Soon, Aikawa, Masayuki, Araki, Shouhei, Chen, Sidong, Chiga, Nobuyuki, Doornenbal, Pieter, Fukuda, Naoki, Ichihara, Takashi, Isobe, Tadaaki, Kawakami, Shunsuke, Kin, Tadahiro, Kondo, Yosuke, Koyama, Shunpei, Kubo, Toshiyuki, Kubono, Shigeru, Uesaka, Meiko, Makinaga, Ayano, Matsushita, Masafumi, Matsuzaki, Teiichiro, Michimasa, Shin'ichiro, Momiyama, Satoru, Nagamine, Shunsuke, Niikura, Megumi, Ozaki, Tomoyuki, Saito, Atsumi, Saito, Takeshi, Shiga, Yoshiaki, Shikata, Mizuki, Shimizu, Yohei, Shimoura, Susumu, Sumikama, Toshiyuki, Söderström, Pär Anders, Suzuki, Hiroshi, Takeda, Hiroyuki, Taniuchi, Ryo, Tsubota, Jun'ichi, Watanabe, Yasushi, Wimmer, Kathrin, Yamamoto, Tatsuya, and Yoshida, Koichi

Abstract

Isotope-production cross sections for p-, d-, and C-induced spallation reactions on Nb93 at 113 MeV/nucleon were measured using the inverse-kinematics method employing secondary targets of CH2, CD2, and C. The measured cross sections for Mo90, Nb90, Y86,88 produced by p-induced reactions were found to be consistent with those measured by the conventional activation method. We performed benchmark tests of the reaction models INCL-4.6, JQMD, and JQMD-2.0 implemented in the Particle and Heavy Ion Transport code System (PHITS) and of the nuclear data libraries JENDL-4.0/HE, TENDL-2017, and ENDF/B-VIII.0. The model calculations also showed generally good agreement with the measured isotope-production cross sections for p-, d-, and C-induced reactions. It also turns out that, among the three nuclear data libraries, JENDL-4.0/HE provides the best agreement with the measured data for the p-induced reactions. We compared the present Nb93 data with the Zr93 data, that were measured previously by the same inverse kinematics method (Kawase et al., Prog. Theor. Exp. Phys. 2017, 093D03 (2017)2050-391110.1093/ptep/ptx110), with particular attention to the effect of neutron-shell closure on isotope production in p- and d-induced spallation reactions. The isotopic distributions of the measured production cross sections in the Zr93 data showed noticeable jumps at neutron number N=50 in the isotopic chains of ΔZ=0 and -1, whereas no such jump appeared in isotopic chain of ΔZ=0 in the Nb93 data. From INCL-4.6 + GEM calculations, we found that the jump formed in the evaporation process is smeared out by the intranuclear cascade component in Nb91 produced by the Nb93(p,p2n) and (d,d2n) reactions on Nb93. Moreover, for Nb93, the distribution of the element-production cross sections as a function of the change in proton number ΔZ is shifted to smaller ΔZ than for Zr93, because the excited Nb prefragments generated by the cascade process are more likely to emit protons than the excited Zr prefragments, due to the smaller proton-separation energies of the Nb isotopes.

Published
2019

13. Coulomb Excitation of Proton-rich N = 80 Isotones at HIE-ISOLDE

Author

Kern, Ralph, primary, Zidarova, Radostina, additional, Pietralla, Norbert, additional, Rainovski, Georgi, additional, Gaffney, Liam P., additional, Blazhev, Andrey, additional, Boukhari, Amar, additional, Cederkäll, Joakim, additional, Cubiss, James G., additional, Djongolov, Martin, additional, Fransen, Christoph, additional, Gladnishki, Kalin, additional, Giannopoulos, Efstathios, additional, Hess, Herbert, additional, Jolie, Jan, additional, Karayonchev, Vasil, additional, Kaya, Levent, additional, Keatings, James M., additional, Kocheva, Diana, additional, Kröll, Thorsten, additional, Möller, Oliver, additional, O’Neill, George G., additional, Pakarinen, Janne, additional, Reiter, Peter, additional, Rosiak, Dawid, additional, Scheck, Marcus, additional, Snall, Jacob, additional, Söderström, Pär-Anders, additional, Spagnoletti, Pietro, additional, Stegmann, Robert, additional, Stoyanova, Milena, additional, Thiel, Stefan, additional, Vogt, Andreas, additional, Warr, Nigel, additional, Welker, Andree, additional, Werner, Volker, additional, Wiederhold, Johannes, additional, and Witte, Hilde De, additional

Published
2020
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14. Isotope production in proton-, deuteron-, and carbon-induced reactions on Nb93 at 113 MeV/nucleon

Author

Nakano, Keita, primary, Watanabe, Yukinobu, additional, Kawase, Shoichiro, additional, Wang, He, additional, Otsu, Hideaki, additional, Sakurai, Hiroyoshi, additional, Takeuchi, Satoshi, additional, Togano, Yasuhiro, additional, Nakamura, Takashi, additional, Maeda, Yukie, additional, Ahn, Deuk Soon, additional, Aikawa, Masayuki, additional, Araki, Shouhei, additional, Chen, Sidong, additional, Chiga, Nobuyuki, additional, Doornenbal, Pieter, additional, Fukuda, Naoki, additional, Ichihara, Takashi, additional, Isobe, Tadaaki, additional, Kawakami, Shunsuke, additional, Kin, Tadahiro, additional, Kondo, Yosuke, additional, Koyama, Shunpei, additional, Kubo, Toshiyuki, additional, Kubono, Shigeru, additional, Uesaka, Meiko, additional, Makinaga, Ayano, additional, Matsushita, Masafumi, additional, Matsuzaki, Teiichiro, additional, Michimasa, Shin'ichiro, additional, Momiyama, Satoru, additional, Nagamine, Shunsuke, additional, Niikura, Megumi, additional, Ozaki, Tomoyuki, additional, Saito, Atsumi, additional, Saito, Takeshi, additional, Shiga, Yoshiaki, additional, Shikata, Mizuki, additional, Shimizu, Yohei, additional, Shimoura, Susumu, additional, Sumikama, Toshiyuki, additional, Söderström, Pär-Anders, additional, Suzuki, Hiroshi, additional, Takeda, Hiroyuki, additional, Taniuchi, Ryo, additional, Tsubota, Jun'ichi, additional, Watanabe, Yasushi, additional, Wimmer, Kathrin, additional, Yamamoto, Tatsuya, additional, and Yoshida, Koichi, additional

Published
2019
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15. In-beam γ-ray spectroscopy of 136Te at relativistic energies

Author

Vaquero, Victor, Jungclaus, Andrea, Doornenbal, Pieter C., Wimmer, Kathrin, Moro, Antônio M., Ogata, Kazuyuki, Furumoto, Takenori, Chen, Sidong, Nácher, Enrique, Sahin, Eda, Shiga, Yoshiaki, Steppenbeck, David, Taniuchi, Ryo, Xu, Zhengyu, Ando, Takashi, Baba, Hidetada, Bello Garrote, Frank Leonel, Franchoo, Serge, Hadynska-Klek, Katarzyna, Kuşoǧlu, Asli, Liu, Jiajian, Lokotko, Taras I., Momiyama, Satoru, Motobayashi, Tohru, Nagamine, Shungsbre, Nakatsuka, Noritsugu, Niikura, Megumi, Orlandi, Riccardo, Saito, Takeshi, Sakuraï, Hiroyoshi, Söderström, Pär Anders, Tveten, Gry Merete, Vajta, Zsolt, and Yalcinkaya, M.

Subjects
Nuclear Experiment
Abstract

The reduced transition probability B(E2;0+1→ 2 + 1 ) to the first excited 2+ state of the neutron-rich nucleus 136 Te , with two protons and two neutrons outside the doubly magic 132 Sn core, was measured via Coulomb excitation at relativistic energies at the RIKEN Radioactive Isotope Beam Factory. A value of B(E2)=0.191 ( 26 ) e2b2 was extracted from the measured inelastic scattering cross section on an Au target taking into account the contributions from both Coulomb and nuclear excitations. In addition, an upper limit for the transition strength to a 2+ state of mixed-symmetry character in the excitation energy range of 1.5–2.2 MeV was determined and compared to the predictions of various theoretical calculations. Because of the high statistics gathered in the present experiment the error of the deduced B(E2) value is dominated by the systematic uncertainties involved in the analysis of Coulomb excitation experiments at beam energies around 150 MeV/u. Therefore, the latter are for the first time assessed in detail in the present work.

Published
2019

16. Quadrupole collectivity in 42Ca from low-energy Coulomb excitation with AGATA

Author

Hadynska-Klek, Katarzyna, Napiorkowski, Paweł Jan, Zielinska, Magdalena, Srebrny, Julian, Maj, Adam, Azaiez, Faisal, Valiente-Dobón, Jose Javier, Kicinska-Habior, M, Nowacki, Frédéric, Naïdja, Houda, Bounthong, B, Rodriguez, T.R., De Angelis, G., Abraham, T., Anil Kumar, G, Bazzacco, Dino, Bellato, Marco, Bortolato, D., Bednarczyk, P., Benzoni, Giovanna, Berti, L, Birkenbach, Benedikt, Bruyneel, B., Brambilla, S., Camera, Franco, Chavas, J, Cederwall, B., Charles, L., Ciemala, M., Cocconi, P, Coleman-Smith, P, Colombo, A, Corsi, A., Crespi, F.C.L., Cullen, Dave M., Czermak, A, Désesquelles, Pierre, Doherty, Daniel T., Dulny, B, Eberth, Jürgen, Farnea, Enrico, Fornal, B., Franchoo, Serge, Gadea, Andrés, Giaz, Agnese, Gottardo, Andrea, Grave, X, Grebosz, J., Görgen, Andreas, Gulmini, M, Habermann, T, Hess, Herbert, Isocrate, R., Iwanicki, J., Jaworski, G, Judson, DS, Jungclaus, Andrea, Karkour, N., Kmiecik, M., Karpinski, D, Kisielinski, M, Kondratyev, N, Korichi, Amel, Komorowska, M, Kowalczyk, M., Korten, Wolfram, Krzysiek, M, Lehaut, G, Leoni, Silvia, Ljungvall, Joa, Lopez-Martens, Araceli, Lunardi, Santo, Maron, G., Mazurek, K., Menegazzo, Roberto, Mengoni, Daniele, Merchan, E., Meczynski, W., Michelagnoli, Caterina, Milion, B, Myalski, S., Napoli, D.R., Niikura, Megumi, Obertelli, Alexandre, Ozmen, SF, Palacz, M, Prochniak, L., Pullia, A., Quintana, B., Rampazzo, G, Recchia, F., Redon, N, Reiter, Peter, Rosso, D., Rusek, K, Sahin, Eda, Salsac, Marie Delphine, Söderström, Pär Anders, Stefan, I., Stezowski, Olivier, Styczen, J, Theisen, Christophe, Toniolo, N, Ur, Cǎlin A., Wadsworth, R, Wasilewska, B., Wiens, Andreas, Wood, J.L., Wrzosek-Lipska, Katarzyna, and Ziblinski, M.

Abstract

A Coulomb-excitation experiment to study electromagnetic properties of 42Ca was performed using a 170-MeV calcium beam from the TANDEM XPU facility at INFN Laboratori Nazionali di Legnaro. γ rays from excited states in 42Ca were measured with the AGATA spectrometer. The magnitudes and relative signs of ten E2 matrix elements coupling six low-lying states in 42Ca, including the diagonal E2 matrix elements of 2+ 1 and 2+ 2 states, were determined using the least-squares code GOSIA. The obtained set of reduced E2 matrix elements was analyzed using the quadrupole sum rule method and yielded overall quadrupole deformation for 0+ 1,2 and 2+ 1,2 states, as well as triaxiality for 0+ 1,2 states, establishing the coexistence of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in 42Ca. The experimental results were compared with the state-of-the-art large-scale shell-model and beyond-mean-field calculations, which reproduce well the general picture of shape coexistence in 42Ca.

Published
2018

17. Transition probabilities in neutron-rich 80,82Se and the role of the {\nu}g9/2 orbital

Author

Litzinger, J, Blazhev, Andrey, Dewald, Alfred, Didierjean, Francois, Duchene, G, Fransen, C., Lozeva, R, Verney, D, De Angelis, G., Bazzacco, Dino, Birkenbach, B., Bottoni, S., Bracco, Angela, Braunroth, T, Cederwall, B., Corradi, Lorenzo, Crespi, F.C.L., Désesquelles, Pierre, Eberth, Jürgen, Ellinger, E., Farnea, Enrico, Fioretto, E., Gernhauser, Roman, Goasduff, A, Görgen, Andreas, Gottardo, Andrea, Grebosz, J, Hackstein, Matthias, Hess, Herbert, Ibrahim, Fadi, Jolie, J, Jungclaus, Andrea, Kolos, K, Korten, Wolfram, Leoni, Silvia, Lunardi, Santo, Maj, Adam, Menegazzo, R., Mengoni, Daniele, Michelagnoli, Caterina, Mijatovic, T., Million, Bénédicte, Möller, O, Modamio, Victor, Montagnoli, G., Montanari, D., Morales, Ana Isabel, Napoli, D.R., Niikura, Megumi, Pietralla, Norbert A., Pollarolo, G., Pullia, A., Quintana, B., Recchia, Francesco, Reiter, Peter, Rosso, D., Sahin, Eda, Salsac, Marie Delphine, Scarlassara, F., Söderström, Pär Anders, Stefanini, AM, Stezowski, Olivier, Szilner, Suzana, Theisen, Christophe, Valiente-Dobón, Jose Javier, Vandone, V, and Vogt, A.

Abstract

Transition probabilities of intermediate-spin yrast and non-yrast excitations in 80,82Se were investigated in a recoil distance Doppler-shift (RDDS) experiment performed at the Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro. The Cologne Plunger device for deep inelastic scattering was used for the RDDS technique and was combined with the AGATA Demonstrator array for the γ -ray detection and coupled to the PRISMA magnetic spectrometer for an event-by-event particle identification. In 80Se, the level lifetimes of the yrast (6+ 1 ) and (8+ 1 ) states and of a non-yrast band feeding the yrast 4+ 1 state are determined. A spin and parity assignment of the head of this sideband is discussed based on the experimental results and supported by large-scale shell-model calculations. In 82Se, the level lifetimes of the yrast 6+ 1 state and the yrare 4+ 2 state and lifetime limits of the yrast (10+ 1 ) state and of the 5− 1 state are determined. Although the experimental results contain large uncertainties, they are interpreted with care in terms of large-scale shell-model calculations using the effective interactions JUN45 and jj44b. The excited states’ wave functions are investigated and discussed with respect to the role of the neutron g9/2 orbital.

Published
2018

18. Collective And Single-particle Structures In The Neutron-rich Doubly Mid-shell Nucleus 170Dy

Author

N. Kurz, K. Y. Chae, Naoki Fukuda, Raymond J. Carroll, Zs. Podolyák, Shigeru Kubono, S. Kanaya, István Kuti, Atsuko Odahara, Philip M Walker, H. Baba, Toshiyuki Sumikama, H. Phong, I. Nishizuka, Thamer Alharbi, Zhengyu Xu, Ayumi Yagi, Shunji Nishimura, Furong Xu, Hiroyuki Takeda, Oliver J. Roberts, Gavin Lotay, Z. Patel, C. M. Shand, T. Isobe, J. J. Valiente-Dobón, Alfredo Estrade, J. Liu, F. G. Kondev, Söderström Pär-anders, Hiroshi Watanabe, S. Terashima, Chang-Bum Moon, H. Kanaoka, Z. Korkulu, Jin Wu, C. J. Griffin, Hiroshi Suzuki, Toshiyuki Kubo, Eiji Ideguchi, I. Kojouharov, D. S. Ahn, G. J. Lane, Giuseppe Lorusso, Naohito Inabe, C. H. Lee, Alison Bruce, P. Doornenbal, S. Lalkovski, P. H. Regan, Eunji Lee, P. Lee, H. L. Liu, H. Sakuraia, C. R. Niţă, F. Browne, Zs. Dombrádi, G. X. Zhang, Zs. Vajta, and H. Schaffner

Subjects
Physics, Fission, Nuclear Theory, Nuclear structure, Spherical shell, Nuclear physics, medicine.anatomical_structure, Rigidity (electromagnetism), Atomic nucleus, Quadrupole, medicine, Neutron, Atomic physics, Nuclear Experiment, Nucleus
Abstract

One of the most successful descriptions of the structure of atomic nuclei is the spherical shell model. It, however, becomes impractical when moving away from closed-shell nuclei. Instead, it is the interplay between the macroscopic shape degrees of freedom and the microscopic nature of the underlying single-particle structure in a deformed basis that determines the nuclear structure. Being the heaviest nucleus precisely in the middle of, known, closed proton and neutron shells, $^{170}$Dy has become a central calibration point for tests of collective models of nuclear physics. However, besides one candidate transition from a previous experiment in Legnaro, Italy, no experimental information is available for this nucleus. Using the EURICA setup at RIKEN, which couples the worlds highest intensity in-flight fission facility with a high-efficiency HPGe array, an experiment in November 2014 produced $^{170}$Dy nuclei by in-flight fission of a $^{238}$U beam. The results from this experiment provide a wealth of information on this elusive nucleus, including the evolution of quadrupole collectivity, rigidity and higher order deformations, as well as the long sought for isomeric $K=6^+$ state, predicted to be exceptionally pure at mid-shell. These results provide us with a rich level scheme for discussing both single-particle and collective structures at mid-shell.

Published
2017

19. Observation of New Neutron-rich Isotopes among Fission Fragments from In-flight Fission of 345 MeV/nucleon 238U: Search for New Isotopes Conducted Concurrently with Decay Measurement Campaigns

Author

Shimizu, Yohei, primary, Kubo, Toshiyuki, additional, Fukuda, Naoki, additional, Inabe, Naohito, additional, Kameda, Daisuke, additional, Sato, Hiromi, additional, Suzuki, Hiroshi, additional, Takeda, Hiroyuki, additional, Yoshida, Koichi, additional, Lorusso, Giuseppe, additional, Watanabe, Hiroshi, additional, Simpson, Gary S., additional, Jungclaus, Andrea, additional, Baba, Hidetada, additional, Browne, Frank, additional, Doornenbal, Pieter, additional, Gey, Guillaunme, additional, Isobe, Tadaaki, additional, Li, Zhihuan, additional, Nishimura, Shunji, additional, Söderström, Pär-Anders, additional, Sumikama, Toshiyuki, additional, Taprogge, Jan, additional, Vajta, Zsolt, additional, Wu, Jin, additional, Xu, Zhengyu, additional, Odahara, Atsuko, additional, Yagi, Ayumi, additional, Nishibata, Hiroki, additional, Lozeva, Radomira, additional, Moon, Changbum, additional, and Jung, HyoSoon, additional

Published
2018
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20. Spallation reaction study for the long-lived fission products in nuclear waste: Cross section measurements for 137 Cs, 90 Sr and 107 Pd using inverse kinematics method

Author

Wang, He, primary, Otsu, Hideaki, additional, Sakurai, Hiroyoshi, additional, Ahn, DeukSoon, additional, Chiga, Nobuyuki, additional, Doornenbal, Pieter, additional, Fukuda, Naoki, additional, Isobe, Tadaaki, additional, Kubo, Toshiyuki, additional, Kubono, Shigeru, additional, Lorusso, Giusseppe, additional, Söderström, Pär-Anders, additional, Suzuki, Hiroshi, additional, Takeda, Hiroyuki, additional, Watanabe, Yasushi, additional, Yoshida, Koichi, additional, Matsuzaki, Teiichiro, additional, Shimizu, Yohei, additional, Sumikama, Toshiyuki, additional, Uesaka, Meiko, additional, Kawase, Shoichiro, additional, Nakano, Keita, additional, Watanabe, Yukinobu, additional, Araki, Shouhei, additional, Kin, Tadahiro, additional, Takeuchi, Satoshi, additional, Togano, Yasuhiro, additional, Nakamura, Takashi, additional, Kondo, Yosuke, additional, Ozaki, Tomoyuki, additional, Saito, Atsumi, additional, Tsubota, Junichi, additional, Aikawa, Masayuki, additional, Makinaga, Ayano, additional, Ando, Takashi, additional, Koyama, Shunpei, additional, Momiyama, Satoru, additional, Nagamine, Shunsuke, additional, Niikura, Megumi, additional, Saito, Takeshi, additional, Taniuchi, Ryo, additional, Wimmer, Kathrin, additional, Kawakami, Shunsuke, additional, Maeda, Yukie, additional, Yamamoto, Tatsuya, additional, Shiga, Yoshiaki, additional, Matsushita, Masafumi, additional, Michimasa, Shin’ichiro, additional, and Shimoura, Susumu, additional

Published
2017
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21. A digital on-line implementation of a Pulse-Shape analysis algorithm for neutron-gamma discrimination in the NEDA detector

Author

Egea, Francisco Javier, Houarner, Charles, González, Vicente, Söderström, Pär-Anders, Nyberg, Johan, Tripon, Michel, Boujrad, Abderrahman, Gadea, Andres, Jastrząb, Marcin, Valiente-Dobón, Jose Javier, France, Gilles De, Lazarus, Ian, Jaworski, G., Hüyük, Tayfun, Luo, X. L., Erduran, Mustafa Nizamettin, Ertürk, Sefa, Moszyńksi, M., Modamio, M., Palacz, M., Sanchis, E., and Wadsworth, R.

Subjects
Pulse-Shape Analysis Algorithm, Neutron-gamma Discrimination, NEDA Detector
Abstract

20th IEEE Real Time Conference, 5–10 Haz 2016, Padova, Italy -- F.J. Egea is with INFN Sezione di Padova, Padova, Italy. E-mail: javiegea@pd.infn.it. -- V. González and E. Sanchis are with Departament d’Enginyeria Electrònica. Universitat de València. Burjassot (Spain). -- C. Houarner, A. Boujrad, M. Tripon and G. de France are with Grand Accélératéur National d’Ions Lourds (GANIL), Caen, France. -- A. Gadea and T. Hüyük are with Institut de Física Corpuscular (IFIC), Paterna, Spain. -- J.J. Valiente-Dobón and G. Jaworski are with LNL (Laboratori Nazionali di Legnaro), Legnaro, Italy. -- J. Nyberg is with Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden. -- M. Moszyński is with National Centre for Nuclear Research, A. Soltana 7, PL 05-400 Otwock-Swierk, Poland. -- M.N. Enduran is with Faculty of Engineering and Natural Sciences, Istanbul Sabahattin Zaim University Istanbul, Turkey. -- S. Ertürk is with Nigde Universitesi, Fen-Edebiyat Falkultesi, Fizik Bölümü, Nigde, Turkey. -- M. Jastrząb is with the Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland. -- I. Lazarus is with STFC Daresbury Laboratory, Warrington, United Kingdom. -- P-A. Söderström is with RIKEN Nishina Center, Wako-shi, Japan. -- V. Modamio is with Universitet I Oslo, Oslo, Norway. -- X. L. Luo is with Department of Instrument Science and Technology, National University of Defense Technology, Changsha, China. -- M.Palacz are with the Heavy Ion Laboratory, University of Warsaw, Warszawa, Poland. -- R. Wadsworth is with Department of Physics, University of York, York, United Kingdom. The detection of rare events close to the proton dripline involve the utilization of high-efficient neutron detectors with excellent neutron-gamma discrimination (NGD) performance. Even though in the literature, several off-line algorithms focus on the maximization of the NGD accuracy, our aim is to look for an on-line efficient implementation capable to discard a majority of the gamma-rays, therefore allowing the system to work to counting rates up to 50 kHz, optimizing hence the overall electronics infrastructure in terms of data throughput. In this paper we analyze two of the most widespread techniques for NGD based on PSA, i.e. the charge-comparison method (CC) and the zero crossover (ZCO). Then, based on the NGD performance and FPGA resource utilization, we select one to be implemented in an FPGA. Finally we present the preliminary results obtained up to now.

Published
2016

22. Study of proton- and deuteron-induced spallation reactions on the long-lived fission product 93Zr at 105 MeV/nucleon in inverse kinematics

Author

Kawase, Shoichiro, primary, Nakano, Keita, additional, Watanabe, Yukinobu, additional, Wang, He, additional, Otsu, Hideaki, additional, Sakurai, Hiroyoshi, additional, Ahn, Deuk Soon, additional, Aikawa, Masayuki, additional, Ando, Takashi, additional, Araki, Shouhei, additional, Chen, Sidong, additional, Chiga, Nobuyuki, additional, Doornenbal, Pieter, additional, Fukuda, Naoki, additional, Isobe, Tadaaki, additional, Kawakami, Shunsuke, additional, Kin, Tadahiro, additional, Kondo, Yosuke, additional, Koyama, Shunpei, additional, Kubono, Shigeru, additional, Maeda, Yukie, additional, Makinaga, Ayano, additional, Matsushita, Masafumi, additional, Matsuzaki, Teiichiro, additional, Michimasa, Shin'ichiro, additional, Momiyama, Satoru, additional, Nagamine, Shunsuke, additional, Nakamura, Takashi, additional, Niikura, Megumi, additional, Ozaki, Tomoyuki, additional, Saito, Atsumi, additional, Saito, Takeshi, additional, Shiga, Yoshiaki, additional, Shikata, Mizuki, additional, Shimizu, Yohei, additional, Shimoura, Susumu, additional, Sumikama, Toshiyuki, additional, Söderström, Pär-Anders, additional, Suzuki, Hiroshi, additional, Takeda, Hiroyuki, additional, Takeuchi, Satoshi, additional, Taniuchi, Ryo, additional, Togano, Yasuhiro, additional, Tsubota, Jun'ichi, additional, Uesaka, Meiko, additional, Watanabe, Yasushi, additional, Wimmer, Kathrin, additional, Yamamoto, Tatsuya, additional, and Yoshida, Koichi, additional

Published
2017
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23. Low-lying Structures Of Exotic Sc Isotopes And The Evolution Of The N=34 Subshell Closure

Author

Steppenbeck, David, primary, Takeuchi, Satoshi, additional, Aoi, Nori, additional, Doornenbal, Pieter, additional, Matsushita, Masafumi, additional, Wang, He, additional, Baba, Hidetada, additional, Go, Shintaro, additional, Lee, Jenny, additional, Matsui, Keishi, additional, Michimasa, Shin'Ichiro, additional, Motobayashi, Tohru, additional, Nishimura, Daiki, additional, Otsuka, Takaharu, additional, Sakurai, Hiroyoshi, additional, Shiga, Yoshiaki, additional, Söderström, Pär-Anders, additional, Sumikama, Toshiyuki, additional, Taniuchi, Ryo, additional, Utsuno, Yutaka, additional, Valiente-Dobon, Jose Javier, additional, and Yoneda, Ken'ichiro, additional

Published
2017
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24. Role Of Hexadecupole Deformation In The Shape Evolution Of Neutron-rich Nd Isotopes

Author

Yokoyama, Rin, primary, Ideguchi, Eiji, additional, Simpson, Gary, additional, Tanaka, Mana, additional, Nishimura, Shunji, additional, Doornnbal, Pieter, additional, Söderström, Pär-Anders, additional, Lorusso, Giuseppe, additional, Xu, Zhengyu, additional, Wu, Jin, additional, Sumikama, Toshiyuki, additional, Aoi, Nori, additional, Baba, Hidetada, additional, Bello, Frank, additional, Browne, Frank, additional, Daido, Rie, additional, Fang, Yifan, additional, Fukuda, Naoki, additional, Gey, Guillaume, additional, Go, Shintaro, additional, Inabe, Naohiro, additional, Isobe, Tadaaki, additional, Kameda, Daisuke, additional, Kobayashi, Kazuma, additional, Kobayashi, Motoki, additional, Komatsubara, Tetsuro, additional, Kubo, Toshiyuki, additional, Kuti, Istvan, additional, Li, Zhihuan, additional, Matsushita, Masafumi, additional, Michimasa, Shin’ichiro, additional, Moon, Chang-Bum, additional, Nishibata, Hiroki, additional, Nishizuka, Ippei, additional, Odahara, Atsuko, additional, Patel, Zena, additional, Rice, Simon, additional, Sahin, Eda, additional, Sinclair, Laura, additional, Suzuki, Hiroshi, additional, Takeda, Hiroyuki, additional, Taprogge, Jan, additional, Vajta, Zsolt, additional, WATANABE, Hiroshi, additional, and Yagi, Ayumi, additional

Published
2017
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25. Spallation reaction study for the long-lived fission product 107Pd

Author

Wang, He, primary, Otsu, Hideaki, additional, Sakurai, Hiroyoshi, additional, Ahn, DeukSoon, additional, Aikawa, Masayuki, additional, Ando, Takashi, additional, Araki, Shouhei, additional, Chen, Sidong, additional, Nobuyuki, Chiga, additional, Doornenbal, Pieter, additional, Fukuda, Naoki, additional, Isobe, Tadaaki, additional, Kawakami, Shunsuke, additional, Kawase, Shoichiro, additional, Kin, Tadahiro, additional, Kondo, Yosuke, additional, Koyama, Shunpei, additional, Kubono, Shigeru, additional, Maeda, Yukie, additional, Makinaga, Ayano, additional, Matsushita, Masafumi, additional, Matsuzaki, Teiichiro, additional, Michimasa, Shin'ichiro, additional, Momiyama, Satoru, additional, Nagamine, Shunsuke, additional, Nakamura, Takashi, additional, Nakano, Keita, additional, Niikura, Megumi, additional, Ozaki, Tomoyuki, additional, Saito, Atsumi, additional, Saito, Takeshi, additional, Shiga, Yoshiaki, additional, Shikata, Mizuki, additional, Shimizu, Yohei, additional, Shimoura, Susumu, additional, Sumikama, Toshiyuki, additional, Söderström, Pär-Anders, additional, Suzuki, Hiroshi, additional, Takeda, Hiroyuki, additional, Takeuchi, Satoshi, additional, Taniuchi, Ryo, additional, Togano, Yasuhiro, additional, Tsubota, Junichi, additional, Uesaka, Meiko, additional, Watanabe, Yasushi, additional, Watanabe, Yukinobu, additional, Wimmer, Kathrin, additional, Yamamoto, Tatsuya, additional, and Yoshida, Koichi, additional

Published
2017
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26. [Beta] decay of 129Cd and excited states in 129In

Author

Taprogge, Jan, Jungclaus, A., Grawe, H., Nishimura, Shunji, Doornenbal, Pieter, Lorusso, Giuseppe, Simpson, G. S., Söderström, Pär-Anders, Sumikama, Toshiyuki, Xu, Z. Y., Baba, H., Browne, Frank, Fukuda, Naoki, Gernhäuser, R., Gey, Guillaume, Inabe, Naohiro, Isobe, Tadaaki, Jung, H. S., Kameda, Daisuke, Kim, G. D., Kim, Y.-K., Kojouharov, I., Kubo, Toshiyuki, Kurz, N., Kwon, Y. K., Li, Z., Sakurai, H., Schaffner, H., Steiger, K., Suzuki, Hiroshi, Takeda, Hiroyuki, Vajta, Zsolt, Watanabe, Hiroshi, Wu, J., Yagi, Ayumi, Yoshinaga, K., Benzoni, G., Bönig, S., Chae, K. Y., Coraggio, L., Covello, A., Daugas, J.-M., Drouet, F., Gadea, A., Gargano, A., Ilieva, S., Kondev, F. G., Kröll, T., Lane, G. J., Montaner-Pizá, A., Moschner, K., Mücher, D., Naqvi, F., Niikura, M., Nishibata, Hiroki, Odahara, Atsuko, Orlandi, R., Patel, Zena, Podolyák, Zs., and Wendt, A.

Subjects
Természettudományok, Fizikai tudományok
Published
2015

27. Isomer decay spectroscopy of 164Sm and 166Gd: midshell collectivity around N=100

Author

Patel, Zena, Söderström, Pär-Anders, Podolyák, Zs., Regan, P. H., Walker, P. M., Watanabe, Hiroshi, Ideguchi, Eiji, Simpson, G. S., Liu, H. L., Nishimura, Shunji, Wu, Q., Xu, F. R., Browne, Frank, Doornenbal, Pieter, Lorusso, Giuseppe, Rice, Simon, Sinclair, Laura, Sumikama, Toshiyuki, Wu, J., Xu, Z. Y., Aoi, Nori, Baba, H., Bello Garrote, F. L., Benzoni, G., Daido, Rie, Fang, Yifan, Fukuda, Naoki, Gey, Guillaume, Go, Shintaro, Gottardo, A., Inabe, Naohiro, Isobe, Tadaaki, Kameda, Daisuke, Kobayashi, K., Kobayashi, Masao, Komatsubara, Tetsuro, Kojouharov, I., Kubo, Toshiyuki, Kurz, N., Kuti, István, Li, Z., Matsushita, Masafumi, Michimasa, Shin'ichiro, Moon, Chang-Bum, Nishibata, Hiroki, Nishizuka, Ippei, Odahara, Atsuko, Şahin, E., Sakurai, H., Schaffner, H., Suzuki, Hiroshi, Takeda, Hiroyuki, Tanaka, Mana, Taprogge, Jan, Vajta, Zsolt, Yagi, Ayumi, and Yokoyama, Rin

Subjects
Természettudományok, Fizikai tudományok
Abstract

Excited states in the N=102 isotones 166Gd and 164Sm have been observed following isomeric decay for the first time at RIBF, RIKEN. The half-lives of the isomeric states have been measured to be 950(60) and 600(140) ns for 166Gd and 164Sm, respectively. Based on the decay patterns and potential energy surface calculations, including β6 deformation, a spin and parity of 6- has been assigned to the isomeric states in both nuclei. Collective observables are discussed in light of the systematics of the region, giving insight into nuclear shape evolution. The decrease in the ground-band energies of 166Gd and 164Sm (N=102) compared to 164Gd and 162Sm (N=100), respectively, presents evidence for the predicted deformed shell closure at N=100.

Published
2014

28. [Beta]-decay half-lives of Co76,77, Ni79,80, and Cu81: Experimental indication of a doubly magic Ni78

Author

Xu, Z. Y., Nishimura, Shunji, Lorusso, Giuseppe, Browne, Frank, Doornenbal, Pieter, Gey, Guillaume, Jung, H. S., Li, Z., Niikura, M., Söderström, Pär-Anders, Sumikama, Toshiyuki, Taprogge, Jan, Vajta, Zsolt, Watanabe, Hiroshi, Wu, J., Yagi, Ayumi, Yoshinaga, K., Baba, H., Franchoo, S., Isobe, Tadaaki, John, P. R., Kojouharov, I., Kubono, S., Kurz, N., Matea, I., Matsui, K., Mengoni, D., Morfouace, P., Napoli, D. R., Naqvi, F., Nishibata, Hiroki, Odahara, Atsuko, Şahin, E., Sakurai, H., Schaffner, H., Stefan, I., Suzuki, D., Taniuchi, R., and Werner, V.

Subjects
Természettudományok, Fizikai tudományok
Published
2014

29. 1p3=2 Proton-Hole State in 132Sn and the Shell Structure Along N ¼ 82

Author

Taprogge, Jan, Jungclaus, A., Grawe, H., Nishimura, Shunji, Doornenbal, Pieter, Lorusso, Giuseppe, Simpson, G. S., Söderström, Pär-Anders, Sumikama, Toshiyuki, Xu, Z. Y., Baba, H., Browne, Frank, Fukuda, Naoki, Gernhäuser, R., Gey, Guillaume, Inabe, Naohiro, Isobe, Tadaaki, Jung, H. S., Kameda, Daisuke, Kim, G. D., Kim, Y.-K., Kojouharov, I., Kubo, Toshiyuki, Kurz, N., Kwon, Y. K., Li, Z., Sakurai, H., Schaffner, H., Steiger, K., Suzuki, Hiroshi, Takeda, Hiroyuki, Vajta, Zsolt, Watanabe, Hiroshi, Wu, J., Yagi, Ayumi, Yoshinaga, K., Benzoni, G., Bönig, S., Chae, K. Y., Coraggio, L., Covello, A., Daugas, J.-M., Drouet, F., Gadea, A., Gargano, A., Ilieva, S., Kondev, F. G., Kröll, T., Lane, G. J., Montaner-Pizá, A., Moschner, K., Mücher, D., Naqvi, F., Niikura, M., Nishibata, Hiroki, Odahara, Atsuko, Orlandi, R., Patel, Zena, Podolyák, Zs., Wendt, A., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), and ILL

Subjects
Természettudományok, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], ddc:550, Fizikai tudományok
Abstract

A low-lying state in 131In82, the one-proton hole nucleus with respect to double magic 132Sn, was observed by its γ decay to the Iπ=1/2- β-emitting isomer. We identify the new state at an excitation energy of Ex=1353 keV, which was populated both in the β decay of 131Cd83 and after β-delayed neutron emission from 132Cd84, as the previously unknown πp3/2 single-hole state with respect to the 132Sn core. Exploiting this crucial new experimental information, shell-model calculations were performed to study the structure of experimentally inaccessible N=82 isotones below 132Sn. The results evidence a surprising absence of proton subshell closures along the chain of N=82 isotones. The consequences of this finding for the evolution of the N=82 shell gap along the r-process path are discussed.

Published
2014

30. Shape evolution in 116,118Ru: Triaxiality and transition between the O(6) and U(5) dynamical symmetries

Author

Söderström, Pär-Anders, Lorusso, Giuseppe, Watanabe, Hiroshi, Nishimura, Shunji, Doornenbal, Pieter, Thiamova, G., Browne, Frank, Gey, Guillaume, Jung, H. S., Sumikama, Toshiyuki, Taprogge, Jan, Vajta, Zsolt, Wu, J., Xu, Z. Y., Baba, H., Benzoni, G., Chae, K. Y., Crespi, F. C. L., Fukuda, Naoki, Gernhäuser, R., Inabe, Naohiro, Isobe, Tadaaki, Jungclaus, A., Kameda, Daisuke, Kim, G. D., Kim, Y.-K., Kojouharov, I., Kondev, F. G., Kubo, Toshiyuki, Kurz, N., Kwon, Y. K., Lane, G. J., Li, Z., Montaner-Pizá, A., Moschner, K., Naqvi, F., Niikura, M., Nishibata, Hiroki, Odahara, Atsuko, Orlandi, R., Patel, Zena, Podolyák, Zs., Sakurai, H., Schaffner, H., Simpson, G. S., Steiger, K., Suzuki, Hiroshi, Takeda, Hiroyuki, Wendt, A., Yagi, Ayumi, Yoshinaga, K., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Természettudományok, Fizikai tudományok, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2013

31. Influence of the np interaction on the beta decay of Pd-94

Author

Singh, B. S. Nara, Brock, T. S., Wadsworth, R., Grawe, H., Boutachkov, P., Braun, N., Blazhev, A., Liu, Z., Gorska, M., Pietri, S., Rudolph, D., Domingo-Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Caceres, L., Engert, T., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhaeuser, R., Goel, N., Gottardo, A., Grebosz, J., Hinke, C., Hoischen, R., Ilie, G., Iwasaki, H., Jolie, J., Kaskas, A., Kojouharov, I., Kruecken, R., Kurz, N., Merchan, E., Nociforo, C., Nyberg, Johan, Pfuetzner, M., Prochazka, A., Podolyak, Zs., Regan, P. H., Reiter, P., Rinta-Antila, S., Scholl, C., Schaffner, H., Söderström, Pär-Anders, Warr, N., Weick, H., Wollersheim, H. -J, Woods, P. J., and Nowacki, F.

Subjects
Naturvetenskap, Natural Sciences
Abstract

We present results from stopped beam rare isotope spectroscopic investigations at the GSI (RISING) experiment based on the detection of gamma-ray transitions following the beta decay of Pd-94. A comparison between the measured low-lying level scheme of Rh-94 and the prediction from shell-model calculations reveals the important roles of the g(7/2) and g(9/2) orbitals in explaining the structural features. The low values of the Gamow-Teller strengths B(GT) can be attributed to the influence of the neutron-proton interaction, which gives rise to an increased seniority mixing for the nuclear states, thereby leading to a fragmentation of the strength to several daughter levels. These results provide further strong indications that Pd-94 resides in the middle of a structural transition region in the Pd isotopes as the N = Z line is approached.

Published
2012

32. Collective Structure of Neutron-Rich Rare-Earth Nuclei and Development of Instrumentation for Gamma-Ray Spectroscopy

Author

Söderström, Pär-Anders

Subjects
neural network, nuclear structure, HPGe detectors, neutrons, Nuclear physics, 150 < A < 189, collective models, gamma-ray tracking, pulse-shape discrimination, Kärnfysik, NEDA, Nuclear Experiment, AGATA
Abstract

Neutron-rich rare-earth nuclei are among the most collective nuclei that can be found in nature. In particular, the doubly mid-shell nucleus 170Dy is expected to be the nucleus where the collective structure is maximized. This has implications for the astrophysical r-process, since it has been suggested that the collectivity maximum plays an important role in the abundances of the rare-earth elements that are created in supernova explosions. In this work, the collective structure of the five nuclei 168,170Dy and 167,168,169Ho are studied and different theoretical models are used to interpret the evolution of collectivity around the mid-shell. In order to produce and study even more neutron-rich nuclei in this mass region, new radioactive ion beam facilities will be a valuable tool. These facilities, however, require advanced instruments to study the weak signals of exotic nuclei in a high background environment. Two of these instruments are the γ-ray tracking spectrometer AGATA and the neutron detector array NEDA. For AGATA to work satisfactorily, the interaction position of the gamma rays must be determined with an accuracy of at least five millimetres. The position resolution is measured in this work using a model independent method based on the Doppler correction capabilities of the detector at two different distances between the detector and the source. For NEDA, one of the critical parameters is its ability to discriminate between neutrons and γ rays. By using digital electronics it is possible to employ advanced and efficient algorithms for pulse-shape discrimination. In this work, digital versions of the common analogue methods are shownto give as good, or better, results compared to the ones obtained using analogue electronics. Another method which effectively distinguishes between neutrons and γ rays is based on artificial neural networks. This method is also investigated in this work and is shown to yield even better results.

Published
2011

33. Isomers of Pm Isotopes on the Neutron-Rich Frontier of the Deformed Z ~ 60 Region

Author

Yokoyama, Rin, primary, Ideguchi, Eiji, additional, Simpson, Gary, additional, Tanaka, Mana, additional, Nishimura, Shunji, additional, Doornnbal, Pieter, additional, Söderström, Pär-Anders, additional, Lorusso, Giuseppe, additional, Xu, Zhengyu, additional, Wu, Jin, additional, Sumikama, Toshiyuki, additional, Aoi, Nori, additional, Baba, Hidetada, additional, Bello, Frank, additional, Browne, Frank, additional, Daido, Rie, additional, Fang, Yifan, additional, Fukuda, Naoki, additional, Gey, Guillaume, additional, Go, Shintaro, additional, Inabe, Naohiro, additional, Isobe, Tadaaki, additional, Kameda, Daisuke, additional, Kobayashi, Kazuma, additional, Kobayashi, Motoki, additional, Komatsubara, Tetsuro, additional, Kubo, Toshiyuki, additional, Kuti, Istvan, additional, Li, Zhihuan, additional, Matsushita, Masafumi, additional, Michimasa, Shin’ichiro, additional, Moon, Chang-Bum, additional, Nishibata, Hiroki, additional, Nishizuka, Ippei, additional, Odahara, Atsuko, additional, Patel, Zena, additional, Rice, Simon, additional, Sahin, Eda, additional, Sinclair, Laura, additional, Suzuki, Hiroshi, additional, Takeda, Hiroyuki, additional, Taprogge, Jan, additional, Vajta, Zsolt, additional, Watanabe, Hiroshi, additional, and Yagi, Ayumi, additional

Published
2015
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34. In-Beam γ-Ray Spectroscopy of Very Neutron-Rich N = 32 and 34 Nuclei

Author

Steppenbeck, David, primary, Takeuchi, Satoshi, additional, Aoi, Nori, additional, Doornenbal, Pieter, additional, Matsushita, Masafumi, additional, Wang, He, additional, Baba, Hidetada, additional, Fukuda, Naoki, additional, Go, Shintaro, additional, Honma, Michio, additional, Lee, Jenny, additional, Matsui, Keishi, additional, Michimasa, Shin’ichiro, additional, Motobayashi, Tohru, additional, Nishimura, Daiki, additional, Otsuka, Takaharu, additional, Sakurai, Hiroyoshi, additional, Shiga, Yoshiaki, additional, Shimizu, Noritaka, additional, Söderström, Pär-Anders, additional, Sumikama, Toshiyuki, additional, Suzuki, Hiroshi, additional, Taniuchi, Ryo, additional, Utsuno, Yutaka, additional, Valiente-Dobón, Jose Javier, additional, and Yoneda, Ken’ichiro, additional

Published
2015
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35. Status of the EURICA Project After One Year at RIKEN

Author

Söderström, Pär-Anders, primary, Nishimura, Shunji, additional, Baba, Hidetada, additional, Browne, Frank, additional, Daido, Rie, additional, Doornenbal, Pieter, additional, Fang, Yifan, additional, Gey, Guillaume, additional, Isobe, Tadaaki, additional, Jung, Hyo-Soon, additional, Li, Zhihuan, additional, Lorusso, Giuseppe, additional, Lubos, Daniel, additional, Mochner, Kevin, additional, Patel, Zena, additional, Rice, Simon, additional, Sakurai, Hiroyoshi, additional, Sinclair, Laura, additional, Sumikama, Toshiyuki, additional, Taprogge, Jan, additional, Vajta, Zsolt, additional, Watanabe, Hiroshi, additional, Wu, Jin, additional, Xu, Zhengyu, additional, Yagi, Ayumi, additional, Yokoyama, Rin, additional, Yoshinaga, Kenta, additional, Benzoni, Giovanna, additional, Blazhev, Andrey, additional, Boutachkov, Plamen, additional, Bruce, Alison, additional, Gernhäuser, Roman, additional, Ideguchi, Eiji, additional, Jungclaus, Andrea, additional, Kim, Gi Dong, additional, Kim, Yong-Kyun, additional, Kojouharov, Ivan, additional, Kurz, Nikolaus, additional, Kwon, Young Kwan, additional, Lewitowicz, Marek, additional, Liu, Zhong, additional, Lozeva, Radomira, additional, Moon, Chang-Bum, additional, Niikura, Megumi, additional, Odahara, Atsuko, additional, Podolyák, Zsolt, additional, Regan, Patrick, additional, Roberts, Oliver, additional, Simpson, Gary, additional, Schaffner, Henning, additional, Townsley, Christopher, additional, and Wadsworth, Robert, additional

Published
2014
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36. Production of protons, deuterons, and tritons from carbon bombarded by 175 MeV quasi mono-energetic neutrons

Author

HIRAYAMA, Shusuke, primary, WATANABE, Yukinobu, additional, HAYASHI, Masateru, additional, NAITO, Yuuki, additional, WATANABE, Takehito, additional, BEVILACQUA, Riccardo, additional, BLOMGREN, Jan, additional, NILSSON, Leif, additional, ÖHRN, Angelica, additional, ÖSTERLUND, Michael, additional, POMP, Stephan, additional, PROKOFIEV, Alexander, additional, SIMUTKIN, Vasily, additional, SÖDERSTRÖM, Pär-Anders, additional, and TIPPAWAN, Udomrat, additional

Published
2011
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38. Spallation reaction study for long-lived fission products in nuclear waste

Author

Wang He, Otsu Hideaki, Sakurai Hiroyoshi, Ahn DeukSoon, Aikawa Masayuki, Ando Takashi, Araki Shouhei, Chen Sidong, Chiga Nobuyuki, Doornenbal Pieter, Fukuda Naoki, Isobe Tadaaki, Kawakami Shunsuke, Kawase Shoichiro, Kin Tadahiro, Kondo Yosuke, Koyama Shunpei, Kubono Shigeru, Maeda Yukie, Makinaga Ayano, Matsushita Masafumi, Matsuzaki Teiichiro, Michimasa Shin ichiro, Momiyama Satoru, Nagamine Shunsuke, Nakamura Takashi, Nakano Keita, Niikura Megumi, Ozaki Tomoyuki, Saito Atsumi, Saito Takeshi, Shiga Yoshiaki, Shikata Mizuki, Shimizu Yohei, Shimoura Susumu, Sumikama Toshiyuki, Söderstrom Pär-Anders, Suzuki Hiroshi, Takeda Hiroyuki, Takeuchi Satoshi, Taniuchi Ryo, Togano Yasuhiro, Tsubota Junichi, Uesaka Meiko, Watanabe Yasushi, Watanabe Yukinobu, Wimmer Kathrin, Yamamoto Tatsuya, and Yoshida Koichi

Subjects
Physics, QC1-999
Abstract

Spallation reaction for the long-lived fission product 107Pd has been studied for the purpose of nuclear waste transmutation. The isotopic-distribution cross sections on both proton and deuteron were obtained at 118 MeV/nucleon in inverse kinematics at the RIKEN Radioactive Isotope Beam Factory. A large cross-section difference was found between the proton and deuteron results for the light-mass products. The data were compared with the SPACS semi-empirical parameterization and the PHITS calculations including both the intranuclear cascade and evaporation processes. In addition, the potential of spallation reaction for transmutation of 107Pd is discussed.

Published
2020
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