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3. RIB induced reactions: Studying astrophysical reactions with low-energy RI beam at CRIB

Author

Yamaguchi H., Hayakawa S., Ma N.R., Shimizu H., Okawa K., Zhang Q., Yang L., Kahl D., La Cognata M., Lamia L., Abe K., Beliuskina O., Cha S.M., Chae K.Y., Cherubini S., Figuera P., Ge Z., Gulino M., Hu J., Inoue A., Iwasa N., Kim A., Kim D., Kiss G., Kubono S., La Commara M., Lattuada M., Lee E.J., Moon J.Y., Palmerini S., Parascandolo C., Park S.Y., Phong V.H., Pierroutsakou D., Pizzone R.G., Rapisarda G.G., Romano S., Spitaleri C., Tang X.D., Trippella O., Tumino A., Zhang N.T., Lam Y.H., Heger A., Jacobs A.M., Xu S.W., Ma S.B., Ru L.H., Liu E.Q., Liu T., Hamill C.B., Murphy A. St J., Su J., Fang X., Kwag M.S., Duy N.N., Uyen N.K., Kim D.H., Liang J., Psaltis A., Sferrazza M., Johnston Z., and Li Y.Y.

Subjects
Physics, QC1-999
Abstract

Astrophysical reactions involving radioactive isotopes (RI) often play an important role in high-temperature stellar environments. The experimental studies on the reaction rates for those are still limited mainly due to the technical difficulties in producing high-quality RI beams. A direct measurement of those reactions would be still challenging in many cases, however, we can make a reliable evaluation of the reaction rates by an indirect method or by studying the resonance prorerties. Here we ntroduce recent examples of experimental studies on such RI-involving astrophysical reactions, performed at Center for Nuclear Study, the University of Tokyo, using the low-energy RI beam separator CRIB. One is for the neutron-induced destruction reactions of 7Be in the Big-Bang nucleosynthesis, and the other is the study on the 22Mg(α, p) reaction relevant in X-ray bursts, which was performed with the resonant scattering method from the inverse reaction channel.

Published
2023
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5. Commissioning of the BRIKEN detector for the measurement of very exotic [formula omitted]-delayed neutron emitters

Author

Tolosa-Delgado, A., Agramunt, J., Tain, J.L., Algora, A., Domingo-Pardo, C., Morales, A.I., Rubio, B., Tarifeño-Saldivia, A., Calviño, F., Cortes, G., Brewer, N.T., Rasco, B.C., Rykaczewski, K.P., Stracener, D.W., Allmond, J.M., Grzywacz, R., Yokoyama, R., Singh, M., King, T., Madurga, M., Nishimura, S., Phong, V.H., Go, S., Liu, J., Matsui, K., Sakurai, H., Kiss, G.G., Isobe, T., Baba, H., Kubono, S., Fukuda, N., Ahn, D.S., Shimizu, Y., Sumikama, T., Suzuki, H., Takeda, H., Söderström, P.A., Takechi, M., Bruno, C.G., Davinson, T., Griffin, C.J., Hall, O., Kahl, D., Woods, P.J., Coleman-Smith, P.J., Labiche, M., Lazarus, I., Morrall, P., Pucknell, V.F. E., Simpson, J., Thomas, S.L., Prydderch, M., Harkness-Brennan, L.J., Page, R.D., Dillmann, I., Caballero-Folch, R., Saito, Y., Estrade, A., Nepal, N., Montes, F., Lorusso, G., Liang, J., Bae, S., Ha, J., and Moon, B.

Published
2019
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7. Beam production of 18Ne with in-flight method for alpha scattering at CRIB

Author

Duy, N.N., Chae, K.Y., Cha, S.M., Yamaguchi, H., Abe, K., Bae, S.H., Binh, D.N., Choi, S.H., Hahn, K.I., Hayakawa, S., Hong, B., Iwasa, N., Kahl, D., Khiem, L.H., Kim, A., Kim, D.H., Kim, E.J., Kim, G.W., Kim, M.J., Kwak, K., Kwag, M.S., Lee, E.J., Lim, S.I., Moon, B., Moon, J.Y., Park, S.Y., Phong, V.H., Shimizu, H., Yang, L., Ge, Z., and Hao, T.V. Nhan

Published
2018
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8. Isomer spectroscopy of neutron-rich 168Tb103

Author

Gurgi, L.A., Regan, P.H., Söderström, P.-A., Watanabe, H., Walker, P.M., Podolyák, Zs., Nishimura, S., Berry, T.A., Doornenbal, P., Lorusso, G., Isobe, T., Baba, H., Xu, Z.Y., Sakurai, H., Sumikama, T., Catford, W.N., Bruce, A.M., Browne, F., Lane, G.J., Kondev, F.G., Odahara, A., Wu, J., Liu, H.L., Xu, F.R., Korkulu, Z., Lee, P., Liu, J.J., Phong, V.H., Yag, A., Zhang, G.X., Alharbi, T., Carroll, R.J., Chae, K.Y., Dombradi, Zs., Estrade, A., Fukuda, N., Griffin, C., Ideguchi, E., Inabe, N., Kanaoka, H., Kojouharov, I., Kubo, T., Kubono, S., Kurz, N., Kuti, I., Lalkovski, S., Lee, E.J., Lee, C.S., Lotay, G., Moon, C.-B., Nishizuka, I., Nita, C.R., Patel, Z., Roberts, O.J., Schaffner, H., Shand, C.M., Suzuki, H., Takeda, H., Terashima, S., Vajta, Zs., Yoshida, S., and Valiente-Dòbon, J.J.

Published
2017
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9. The -decay of Kr into Br: Restoration of the pseudo-SU(4) symmetry

Author

Vitéz-Sveiczer, A., Algora, A., Morales, A.I., Rubio, B., Kiss, G.G., Sarriguren, P., Van Isacker, P., de Angelis, G., Recchia, F., Nishimura, S., Agramunt, J., Guadilla, V., Montaner-Pizá, A., Orrigo, S.E.A., Horváth, A., Napoli, D., Lenzi, S., Boso, A., Phong, V.H., Wu, J., Söderström, P.A., Sumikama, T., Suzuki, H., Takeda, H., Ahn, D.S., Baba, H., Doornebal, P., Fukuda, N., Inabe, N., Isobe, T., Kubo, T., Kubono, S., Sakurai, H., Shimizu, Y., Sidong, C., Blank, B., Ascher, P., Gerbaux, M., Goigoux, T., Giovinazzo, J., Grévy, S., Kurtukián Nieto, T., Magron, C., Gelletly, W., Dombrádi, Zs., Fujita, Y., Tanaka, M., Aguilera, P., Molina, F., Eberth, J., Diel, F., Lubos, D., Borcea, C., Ganioglu, E., Nishimura, D., Oikawa, H., Takei, Y., Yagi, S., Korten, W., de France, G., Davies, P., Liu, J., Lee, J., Lokotko, T., Kojouharov, I., Kurz, N., Shaffner, H., and Petrovici, A.

Abstract

The β-decay of the even-even nucleus $^{70}$Kr with Z=N+2, has been investigated at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center using the BigRIPS fragment separator, the ZeroDegree Spectrometer, the WAS3ABI implantation station and the EURICA HPGe cluster array. Fifteen γ-rays associated with the β-decay of $^{70}$Kr into $^{70}$Br have been identified for the first time, defining ten populated states below Eexc=3300 keV. The half-life of $^{70}$Kr was derived with increased precision and found to be t1/2=45.19±0.14 ms. The β-delayed proton emission probability has also been determined as εp=0.545(23)%. An increase in the β-strength to the yrast 1$^{+}$ state in comparison with the heaviest Z=N+2 system studied so far ($^{62}$Ge decay) is observed that may indicate increased np correlations in the T=0 channel. The β-decay strength deduced from the results is interpreted in terms of the proton-neutron quasiparticle random-phase approximation (pnQRPA) and also with a schematic model that includes isoscalar and isovector pairing in addition to quadrupole deformation. The application of this last model indicates an approximate realization of pseudo-SU(4) symmetry in this system.

Published
2022

10. The β-decay of 70Kr into 70Br: Restoration of the pseudo-SU(4) symmetry

Author

Vitéz-Sveiczer, A., primary, Algora, A., additional, Morales, A.I., additional, Rubio, B., additional, Kiss, G.G., additional, Sarriguren, P., additional, Van Isacker, P., additional, de Angelis, G., additional, Recchia, F., additional, Nishimura, S., additional, Agramunt, J., additional, Guadilla, V., additional, Montaner-Pizá, A., additional, Orrigo, S.E.A., additional, Horváth, A., additional, Napoli, D., additional, Lenzi, S., additional, Boso, A., additional, Phong, V.H., additional, Wu, J., additional, Söderström, P.-A., additional, Sumikama, T., additional, Suzuki, H., additional, Takeda, H., additional, Ahn, D.S., additional, Baba, H., additional, Doornebal, P., additional, Fukuda, N., additional, Inabe, N., additional, Isobe, T., additional, Kubo, T., additional, Kubono, S., additional, Sakurai, H., additional, Shimizu, Y., additional, Sidong, C., additional, Blank, B., additional, Ascher, P., additional, Gerbaux, M., additional, Goigoux, T., additional, Giovinazzo, J., additional, Grévy, S., additional, Kurtukián Nieto, T., additional, Magron, C., additional, Gelletly, W., additional, Dombrádi, Zs., additional, Fujita, Y., additional, Tanaka, M., additional, Aguilera, P., additional, Molina, F., additional, Eberth, J., additional, Diel, F., additional, Lubos, D., additional, Borcea, C., additional, Ganioglu, E., additional, Nishimura, D., additional, Oikawa, H., additional, Takei, Y., additional, Yagi, S., additional, Korten, W., additional, de France, G., additional, Davies, P., additional, Liu, J., additional, Lee, J., additional, Lokotko, T., additional, Kojouharov, I., additional, Kurz, N., additional, Shaffner, H., additional, and Petrovici, A., additional

Published
2022
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11. The β-decay of 70Kr into 70Br: Restoration of the pseudo-SU(4) symmetry

Author

Vitéz-Sveiczer, A., Algora, A., Morales, A.I., Rubio, B., Kiss, G.G., Sarriguren, P., van Isacker, P., de Angelis, G., Recchia, F., Nishimura, S., Agramunt, J., Guadilla, V., Montaner-Pizá, A., Orrigo, S.E.A., Horváth, A., Napoli, D., Lenzi, S., Boso, A., Phong, V.H., Wu, J., Söderström, P.-A., Sumikama, T., Suzuki, H., Takeda, H., Ahn, D.S., Baba, H., Doornebal, P., Fukuda, N., Inabe, N., Isobe, T., Kubo, T., Kubono, S., Sakurai, H., Shimizu, Y., Sidong, C., Blank, B., Ascher, P., Gerbaux, M., Goigoux, T., Giovinazzo, J., Grévy, S., Kurtukián Nieto, T., Magron, C., Gelletly, W., Dombrádi, Zs., Fujita, Y., Tanaka, M., Aguilera, P., Molina, F., Eberth, J., Diel, F., Lubos, D., Borcea, C., Ganioglu, E., Nishimura, D., Oikawa, H., Takei, Y., Yagi, S., Korten, W., de France, G., Davies, P., Liu, J., Lee, J., Lokotko, T., Kojouharov, I., Kurz, N., Shaffner, H., Petrovici, A., Ministry of Innovation and Technology (Hungary), Agencia Nacional de Investigación y Desarrollo (Chile), RIKEN Nishina Center for Accelerator-Based Science, University of Tokyo, Ministerio de Ciencia e Innovación (España), Ministerio de Ciencia, Innovación y Universidades (España), Consejo Superior de Investigaciones Científicas (España), Science and Technology Facilities Council (UK), Ministry of Human Capacities (Hungary), Japan Society for the Promotion of Science, Hungarian Academy of Sciences, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
Nuclear and High Energy Physics, QRPA calculations, Kr, Pseudo-SU(4) symmetry, pn pairing, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Beta decay of, 70, GT strength distribution, Beta decay of Kr 70 | GT strength distribution | pn pairing | Pseudo-SU(4) symmetry | QRPA calculations
Abstract

8 pags., 4 figs., 1 tab., The β-decay of the even-even nucleus 70Kr with Z=N+2, has been investigated at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center using the BigRIPS fragment separator, the ZeroDegree Spectrometer, the WAS3ABI implantation station and the EURICA HPGe cluster array. Fifteen γ-rays associated with the β-decay of 70Kr into 70Br have been identified for the first time, defining ten populated states below Eexc=3300 keV. The half-life of 70Kr was derived with increased precision and found to be t1/2=45.19±0.14 ms. The β-delayed proton emission probability has also been determined as εp=0.545(23)%. An increase in the β-strength to the yrast 1+ state in comparison with the heaviest Z=N+2 system studied so far (62Ge decay) is observed that may indicate increased np correlations in the T=0 channel. The β-decay strength deduced from the results is interpreted in terms of the proton-neutron quasiparticle random-phase approximation (pnQRPA) and also with a schematic model that includes isoscalar and isovector pairing in addition to quadrupole deformation. The application of this last model indicates an approximate realization of pseudo-SU(4) symmetry in this system., This work was supported by the National Research, Development and Innovation Fund of the Ministry for Innovation and Technology, Hungary with project no. TKP2021-NKTA-42 under the TKP2021 funding scheme. FM acknowledges the support of ANID/FONDECYT Regular 1171467 and ANID/FONDECYT Regular 1221364 national projects. This work was carried out at the RIBF operated by RIKEN Nishina Center and CNS, University of Tokyo. We acknowledge the EUROBALL Owners Committee for the loan of germanium detectors and the PreSpec Collaboration for the readout electronics of the cluster detectors. This work was supported by the Spanish MICINN grants FPA2014-52823-C2-1-P, FPA2017- 83946-C2-1-P (MCIU/AEI/FEDER); Ministerio de Ciencia e Innovación grant PID2019-104714GB-C21; Centro de Excelencia Severo Ochoa del IFIC SEV-2014-0398; Junta para la Ampliación de Estudios Programme (CSIC JAE-Doc contract) co-financed by FSE, by NKFIH (NN128072), the National Research, Development and Innovation Fund of Hungary Project No. K 128729 the STFC (UK) through Grant No. ST/P005314/, the PROMETEO/2019/007 project and by the ÚNKP-20-5-DE-02 New National Excellence Program of the Ministry of Human Capacities of Hungary and by the JSPS KAKENHI of Japan (Grant No. 25247045). G.G. Kiss acknowledges support from the János Bolyai research fellowship of the Hungarian Academy of Sciences. A. A. acknowledges partial support of the JSPS Invitational Fellowships for Research in Japan (ID: L1955) P. S. acknowledges support from MCI/AEI/FEDER,UE (Spain) under grant PGC2018-093636-B-I00.

Published
2022
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12. β-γ and isomeric decay spectroscopy of 168Dy

Author

Zhang G.X., Watanabe H., Kondev F.G., Lane G.J., Regan P.H., Söderström P.-A., Walker P.M., Kanaoka H., Korkulu Z., Lee P.S, Liu J.J, Nishimura S., Wu J., Yagi A., Ahn D.S., Alharbi T., Baba H., Browne F., Bruce A.M., Carroll R.J., Chae K.Y., Dombradi Zs., Doornenbal P., Estrade A., Fukuda N., Griffin C., Ideguchi E., Inabe N., Isobe T., Kanaya S., Kojouharov I., Kubo T., Kubono S., Kurz N., Kuti I., Lalkovski S., Lee C.S., Lee E.J., Lorusso G., Lotay G., Moon C.-B, Nishizuka I., Nita C.R., Odahara A., Patel Z., Phong V.H., Podolyák Zs., Roberts O.J., Sakurai H., Schaffner H., Shand C.M., Shimizu Y., Sumikama T., Suzuki H., Takeda H., Terashima S., Vajta Zs., Valiente-Dóbon J.J., and Xu Z.Y.

Subjects
Physics, QC1-999
Abstract

This contribution will report on the experimental work on the level structure of 168Dy. The experimental data have been taken as part of the EURICA decay spectroscopy campaign at RIBF, RIKEN in November 2014. In the experiment, a 238U primary beam is accelerated up to 345 MeV/u with an average intensity of 12 pnA. The nuclei of interest are produced by in-flight fission of 238U impinging on Be target with a thickness of 5 mm. The excited states of 168Dy have been populated through the decay from a newly identified isomeric state and via the β decay from 168Tb. In this contribution, scientific motivations, experimental procedure and some preliminary results for this study are presented.

Published
2018
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13. Isomer-delayed gamma-ray spectroscopy of neutron-rich 166Tb

Author

Gurgi L.A., Regan P.H., Söderström P.-A., Watanabe H., Walker P.M., Podolyák Zs., Nishimura S., Berry T.A., Doornenbal P., Lorusso G., Isobe T., Baba H., Xu Z.Y., Sakurai H., Sumikama T., Catford W.N., Bruce A.M., Browne F., Lane G.J., Kondev F.G., Odahara A., Wu J., Liu H.L., Xu F.R., Korkulu Z., Lee P., Liu J.J., Phong V.H., Yagi A., Zhang G.X., Alharbi T., Carroll R.J., Chae K.Y., Dombradi Zs., Estrade A., Fukuda N., Griffin C., Ideguchi E., Inabe N., Kanaoka H., Kojouharov I., Kubo T., Kubono S., Kurz N., Kuti I., Lalkovski S., Lee E.J., Lee C.S., Lotay G., Moon C.B., Nishizuka I., Nita C.R., Patel Z., Roberts O.J., Schaffner H., Shand C.M., Suzuki H., Takeda H., Terashima S., Vajta Zs., Kanaya S., and Valiente-Dobòn J.J.

Subjects
Physics, QC1-999
Abstract

This short paper presents the identification of a metastable, isomeric-state decay in the neutron-rich odd-odd, prolate-deformed nucleus 166Tb. The nucleus of interest was formed using the in-flight fission of a 345 MeV per nucleon 238U primary beam at the RIBF facility, RIKEN, Japan. Gamma-ray transitions decaying from the observed isomeric states in 166Tb were identified using the EURICA gamma-ray spectrometer, positioned at the final focus of the BigRIPS fragments separator. The current work identifies a single discrete gamma-ray transition of energy 119 keV which de-excites an isomeric state in 166Tb with a measured half-life of 3.5(4) μs. The multipolarity assignment for this transition is an electric dipole and is made on the basis internal conversion and decay lifetime arguments. Possible two quasi-particle Nilsson configurations for the initial and final states which are linked by this transition in 166Tb are made on the basis of comparison with Blocked BCS Nilsson calculations, with the predicted ground state configuration for this nucleus arising from the coupling of the v(1-/2)[521] and π(3+/2) Nilsson orbitals.

Published
2017
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14. ß-delayed neutron emission of r-process nuclei at the N¿=¿82 shell closure

Author

Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Hall, O, Davinson, T, Estrade, A, Lorusso, G., Montes, F., Nishimura, Shunji, Phong, V.H., Agramunt Ros, Jorge, Woods, Phil J., Ahn, D.S., Algora, A., Baba, H., Calviño Tavares, Francisco, Cortés Rossell, Guillem Pere, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Hall, O, Davinson, T, Estrade, A, Lorusso, G., Montes, F., Nishimura, Shunji, Phong, V.H., Agramunt Ros, Jorge, Woods, Phil J., Ahn, D.S., Algora, A., Baba, H., Calviño Tavares, Francisco, and Cortés Rossell, Guillem Pere

Abstract

Theoretical models of ß-delayed neutron emission are used as crucial inputs in r-process calculations. Benchmarking the predictions of these models is a challenge due to a lack of currently available experimental data. In this work the ß-delayed neutron emission probabilities of 33 nuclides in the important mass regions south and south-west of 132Sn are presented, 16 for the first time. The measurements were performed at RIKEN using the Advanced Implantation Detector Array (AIDA) and the BRIKEN neutron detector array. The values presented constrain the predictions of theoretical models in the region, affecting the final abundance distribution of the second r-process peak at ., Peer Reviewed, Article signat per 58 autors/es J. Liu, S. Bae, N.T. Brewer, C.G. Bruno, R. Caballero-Folch, P.J. Coleman-Smith, I. Dillmann, C. Domingo-Pardo, A. Fijalkowska, N. Fukuda, S. Go, C.J. Griffin, R. Grzywacz, J. Ha, L. J. Harkness-Brennan, T. Isobe, D. Kahl, L.H. Khiem, G.G. Kiss, A. Korgul, S. Kubono, M. Labiche, I. Lazarus, P. Morrall, M.R. Mumpower, N. Nepal, R.D. Page, M. Piersa , V.F.E. Pucknell , B.C. Rasco, B. Rubio, K.P. Rykaczewski , H. Sakurai , Y. Shimizu , D.W. Stracener, T. Sumikama , H. Suzuki, J.L. Tain , H. Takeda, A. Tarifeño-Saldivia, A. Tolosa-Delgado , M. Wolinska-Cichocka , R. Yokoyama, Postprint (author's final draft)

Published
2021

15. β-delayed neutron emission of r-process nuclei at the N = 82 shell closure

Author

Hall, O., primary, Davinson, T., additional, Estrade, A., additional, Liu, J., additional, Lorusso, G., additional, Montes, F., additional, Nishimura, S., additional, Phong, V.H., additional, Woods, P.J., additional, Agramunt, J., additional, Ahn, D.S., additional, Algora, A., additional, Allmond, J.M., additional, Baba, H., additional, Bae, S., additional, Brewer, N.T., additional, Bruno, C.G., additional, Caballero-Folch, R., additional, Calviño, F., additional, Coleman-Smith, P.J., additional, Cortes, G., additional, Dillmann, I., additional, Domingo-Pardo, C., additional, Fijalkowska, A., additional, Fukuda, N., additional, Go, S., additional, Griffin, C.J., additional, Grzywacz, R., additional, Ha, J., additional, Harkness-Brennan, L.J., additional, Isobe, T., additional, Kahl, D., additional, Khiem, L.H., additional, Kiss, G.G., additional, Korgul, A., additional, Kubono, S., additional, Labiche, M., additional, Lazarus, I., additional, Liang, J., additional, Liu, Z., additional, Matsui, K., additional, Miernik, K., additional, Moon, B., additional, Morales, A.I., additional, Morrall, P., additional, Mumpower, M.R., additional, Nepal, N., additional, Page, R.D., additional, Piersa, M., additional, Pucknell, V.F.E., additional, Rasco, B.C., additional, Rubio, B., additional, Rykaczewski, K.P., additional, Sakurai, H., additional, Shimizu, Y., additional, Stracener, D.W., additional, Sumikama, T., additional, Suzuki, H., additional, Tain, J.L., additional, Takeda, H., additional, Tarifeño-Saldivia, A., additional, Tolosa-Delgado, A., additional, Wolińska-Cichocka, M., additional, and Yokoyama, R., additional

Published
2021
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16. Interplay of quasiparticle and vibrational excitations: First observation of isomeric states in Dy and Dy

Author

Zhang, G.X., Watanabe, H., Dracoulis, G.D., Kondev, F.G., Lane, G.J., Regan, P.H., Söderström, P.A., Walker, P.M., Yoshida, K., Kanaoka, H., Korkulu, Z., Lee, P.S., Liu, J.J., Nishimura, S., Wu, J., Yagi, A., Ahn, D.S., Alharbi, T., Baba, H., Browne, F., Bruce, A.M., Carpenter, M.P., Carroll, R.J., Chae, K.Y., Chiara, C.J., Dombradi, Zs., Doornenbal, P., Estrade, A., Fukuda, N., Griffin, C., Ideguchi, E., Inabe, N., Isobe, T., Kanaya, S., Kojouharov, I., Kubo, T., Kubono, S., Kurz, N., Kuti, I., Lalkovski, S., Lauritsen, T., Lee, C.S., Lee, E.J., Lister, C.J., Lorusso, G., Lotay, G., McCutchan, E.A., Moon, C.B., Nishizuka, I., Nita, C.R., Odahara, A., Patel, Z., Phong, V.H., Podolyák, Zs., Roberts, O.J., Sakurai, H., Schaffner, H., Seweryniak, D., Shand, C.M., Shimizu, Y., Sumikama, T., Suzuki, H., Takeda, H., Terashima, S., Vajta, Zs., Valiente-Dóbon, J.J., Xu, Z.Y., and Zhu, S.

Abstract

The neutron-rich dysprosium isotopes $^{168}$Dy$_{102}$ and $^{169}$Dy$_{103}$ have been investigated using the EURICA γ-ray spectrometer, following production via in-flight fission of a high-intensity uranium beam in conjunction with isotope separation through the BigRIPS separator at RIBF in RIKEN Nishina Center. For $^{168}$Dy, a previously unreported isomer with a half-life of 0.57(7) μs has been identified at an excitation energy of 1378 keV, and its presence affirmed independently using γ-γ-γ coincidence data taken with Gammasphere via two-proton transfer from an enriched $^{170}$Er target performed at Argonne National Laboratory. This isomer is assigned Jπ=Kπ=(4−) based on the measured transition strengths, decay patterns, and the energy systematics for two-quasiparticle states in N=102 isotones. The underlying mechanism of two-quasiparticle excitations in the doubly midshell region is discussed in comparison with the deformed QRPA and multi-quasiparticle calculations. In $^{169}$Dy, the B(E2) value for the transition de-exciting the previously unreported Kπ=(1/2−) isomeric state at 166 keV to the Kπ=(5/2−) ground state is approximately two orders of magnitude larger than the E2 strength for the corresponding isomeric-decay transition in the N=103 isotone $^{173}$Yb, suggesting the presence of a significant γ-vibrational admixture with a dominant neutron one-quasiparticle component in the isomeric state.

Published
2019

17. Interplay of quasiparticle and vibrational excitations: First observation of isomeric states in ¹⁶⁸Dy and ¹⁶⁹Dy

Author

Zhang, G.X., Watanabe, H., Dracoulis, G.D., Kondev, F.G., Lane, G.J., Regan, P.H., Söderström, P.-A., Walker, P.M., Yoshida, K., Kanaoka, H., Korkulu, Z., Lee, P.S., Liu, J.J., Nishimura, S., Wu, J., Yagi, A., Ahn, D.S., Alharbi, T., Baba, H., Browne, F., Bruce, A.M., Carpenter, M.P., Carroll, R.J., Chae, K.Y., Chiara, C.J., Dombradi, Zs., Doornenbal, P., Estrade, A., Fukuda, N., Griffin, C., Ideguchi, E., Inabe, N., Isobe, T., Kanaya, S., Kojouharov, I., Kubo, T., Kubono, S., Kurz, N., Kuti, I., Lalkovski, S., Lauritsen, T., Lee, C.S., Lee, E.J., Lister, C.J., Lorusso, G., Lotay, G., McCutchan, E.A., Moon, C.-B., Nishizuka, I., Nita, C.R., Odahara, A., Patel, Z., Phong, V.H., Podolyak, Zs., Roberts, O.J., Sakurai, H., Schaffner, H., Seweryniak, D., Shand, C.M., Shimizu, Y., Sumikama, T., Suzuki, H., Takeda, H., Terashima, S., Vajta, Zs., Valiente-Dóbon, J.J., Xu, Z.Y., and Zhu, S.

Abstract

The neutron-rich dysprosium isotopes ¹⁶⁸Dy₁₀₂ and ¹⁶⁹Dy₁₀₃ have been investigated using the EURICA γ-ray spectrometer, following production via in-flight fission of a high-intensity uranium beam in conjunction with isotope separation through the BigRIPS separator at RIBF in RIKEN Nishina Center. For ¹⁶⁸Dy, a previously unreported isomer with a half-life of 0.57(7) μs has been identified at an excitation energy of 1378 keV, and its presence affirmed independently using γ-γ-γ coincidence data taken with Gammasphere via two-proton transfer from an enriched ¹⁷⁰Er target performed at Argonne National Laboratory. This isomer is assigned Jπ = Kπ = (4⁻) based on the measured transition strengths, decay patterns, and the energy systematics for two-quasiparticle states in N = 102 isotones. The underlying mechanism of two-quasiparticle excitations in the doubly midshell region is discussed in comparison with the deformed QRPA and multi-quasiparticle calculations. In ¹⁶⁹Dy, the B(E2) value for the transition de-exciting the previously unreported Kπ = (1/2⁻) isomeric state at 166 keV to the Kπ = (5/2⁻) ground state is approximately two orders of magnitude larger than the E2 strength for the corresponding isomeric-decay transition in the N = 103 isotone ¹⁷³Yb, suggesting the presence of a significant γ-vibrational admixture with a dominant neutron one-quasiparticle component in the isomeric state.

Published
2019

18. Studying the Exotic Decay \(^{70}\)Kr \(\rightarrow {}^{70}\)Br

Author

Vitéz-Sveiczer, A., primary, Algora, A., additional, Morales, A.I., additional, Rubio, B., additional, Kiss, G.G., additional, de Angelis, G., additional, Recchia, F., additional, Nishimura, S., additional, Agramunt, J., additional, Guadilla, V., additional, Montaner-Pizá, A., additional, Orrigo, S.E.A., additional, Horváth, A., additional, Napoli, D., additional, Lenzi, S., additional, Boso, A., additional, Phong, V.H., additional, Wu, J., additional, Söderström, P.-A., additional, Sumikama, T., additional, Suzuki, H., additional, Takeda, H., additional, Ahn, D.S., additional, Baba, H., additional, Doornebal, P., additional, Fukuda, N., additional, Inabe, N., additional, Isobe, T., additional, Kubo, T., additional, Kubono, S., additional, Sakurai, H., additional, Shimizu, Y., additional, Chen, S., additional, Blank, B., additional, Ascher, P., additional, Gerbaux, M., additional, Goigoux, T., additional, Giovinazzo, J., additional, Grévy, S., additional, Kurtukián Nieto, T., additional, Magron, C., additional, Gelletly, W., additional, Dombrádi, Zs., additional, Fujita, Y., additional, Tanaka, M., additional, Aguilera, P., additional, Molina, F., additional, Eberth, J., additional, Diel, F., additional, Lubos, D., additional, Borcea, C., additional, Ganioglu, E., additional, Nishimura, D., additional, Oikawa, H., additional, Takei, Y., additional, Yagi, S., additional, Korten, W., additional, de France, G., additional, Davies, P., additional, Liu, J., additional, Lee, J., additional, Lokotko, T., additional, Kojouharov, I., additional, Kurz, N., additional, and Shaffner, H., additional

Published
2020
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19. Interplay of quasiparticle and vibrational excitations: First observation of isomeric states in 168Dy and 169Dy

Author

Zhang, G.X., primary, Watanabe, H., additional, Dracoulis, G.D., additional, Kondev, F.G., additional, Lane, G.J., additional, Regan, P.H., additional, Söderström, P.-A., additional, Walker, P.M., additional, Yoshida, K., additional, Kanaoka, H., additional, Korkulu, Z., additional, Lee, P.S., additional, Liu, J.J., additional, Nishimura, S., additional, Wu, J., additional, Yagi, A., additional, Ahn, D.S., additional, Alharbi, T., additional, Baba, H., additional, Browne, F., additional, Bruce, A.M., additional, Carpenter, M.P., additional, Carroll, R.J., additional, Chae, K.Y., additional, Chiara, C.J., additional, Dombradi, Zs., additional, Doornenbal, P., additional, Estrade, A., additional, Fukuda, N., additional, Griffin, C., additional, Ideguchi, E., additional, Inabe, N., additional, Isobe, T., additional, Kanaya, S., additional, Kojouharov, I., additional, Kubo, T., additional, Kubono, S., additional, Kurz, N., additional, Kuti, I., additional, Lalkovski, S., additional, Lauritsen, T., additional, Lee, C.S., additional, Lee, E.J., additional, Lister, C.J., additional, Lorusso, G., additional, Lotay, G., additional, McCutchan, E.A., additional, Moon, C.-B., additional, Nishizuka, I., additional, Nita, C.R., additional, Odahara, A., additional, Patel, Z., additional, Phong, V.H., additional, Podolyák, Zs., additional, Roberts, O.J., additional, Sakurai, H., additional, Schaffner, H., additional, Seweryniak, D., additional, Shand, C.M., additional, Shimizu, Y., additional, Sumikama, T., additional, Suzuki, H., additional, Takeda, H., additional, Terashima, S., additional, Vajta, Zs., additional, Valiente-Dóbon, J.J., additional, Xu, Z.Y., additional, and Zhu, S., additional

Published
2019
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20. Segmented YSO scintillation detectors as a new β-implant detection tool for decay spectroscopy in fragmentation facilities

Author

Yokoyama, R., primary, Singh, M., additional, Grzywacz, R., additional, Keeler, A., additional, King, T.T., additional, Agramunt, J., additional, Brewer, N.T., additional, Go, S., additional, Heideman, J., additional, Liu, J., additional, Nishimura, S., additional, Parkhurst, P., additional, Phong, V.H., additional, Rajabali, M.M., additional, Rasco, B.C., additional, Rykaczewski, K.P., additional, Stracener, D.W., additional, Tain, J.L., additional, Tolosa-Delgado, A., additional, Vaigneur, K., additional, and Wolińska-Cichocka, M., additional

Published
2019
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21. Commissioning of the BRIKEN detector for the measurement of very exotic β-delayed neutron emitters

Author

Tolosa-Delgado, A., primary, Agramunt, J., additional, Tain, J.L., additional, Algora, A., additional, Domingo-Pardo, C., additional, Morales, A.I., additional, Rubio, B., additional, Tarifeño-Saldivia, A., additional, Calviño, F., additional, Cortes, G., additional, Brewer, N.T., additional, Rasco, B.C., additional, Rykaczewski, K.P., additional, Stracener, D.W., additional, Allmond, J.M., additional, Grzywacz, R., additional, Yokoyama, R., additional, Singh, M., additional, King, T., additional, Madurga, M., additional, Nishimura, S., additional, Phong, V.H., additional, Go, S., additional, Liu, J., additional, Matsui, K., additional, Sakurai, H., additional, Kiss, G.G., additional, Isobe, T., additional, Baba, H., additional, Kubono, S., additional, Fukuda, N., additional, Ahn, D.S., additional, Shimizu, Y., additional, Sumikama, T., additional, Suzuki, H., additional, Takeda, H., additional, Söderström, P.A., additional, Takechi, M., additional, Bruno, C.G., additional, Davinson, T., additional, Griffin, C.J., additional, Hall, O., additional, Kahl, D., additional, Woods, P.J., additional, Coleman-Smith, P.J., additional, Labiche, M., additional, Lazarus, I., additional, Morrall, P., additional, Pucknell, V.F. E., additional, Simpson, J., additional, Thomas, S.L., additional, Prydderch, M., additional, Harkness-Brennan, L.J., additional, Page, R.D., additional, Dillmann, I., additional, Caballero-Folch, R., additional, Saito, Y., additional, Estrade, A., additional, Nepal, N., additional, Montes, F., additional, Lorusso, G., additional, Liang, J., additional, Bae, S., additional, Ha, J., additional, and Moon, B., additional

Published
2019
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22. Observation of a us isomer in 134-In: Proton-neutron coupling “southeast” of 132-Sn

Author

Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Phong, V.H., Lorusso, G., Calviño Tavares, Francisco, Cortés Rossell, Guillem Pere, Tarifeño Saldivia, Ariel Esteban, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Phong, V.H., Lorusso, G., Calviño Tavares, Francisco, Cortés Rossell, Guillem Pere, and Tarifeño Saldivia, Ariel Esteban

Abstract

We report on the observation of a microsecond isomeric state in the single-proton-hole, three-neutron-particlenucleus134In. The nuclei of interest were produced by in-flight fission of a238U beam at the Radioactive IsotopeBeam Factory at RIKEN. The isomer depopulates through a¿ray of energy 56.7(1) keV and with a half-life ofT1/2=3.5(4)µs. Based on the comparison with shell-model calculations, we interpret the isomer as theIp=5-member of thep0g-19/2¿¿1f37/2multiplet, decaying to theIp=7-ground state with a reduced-transitionprobability ofB(E2; 5-¿7-)=0.53(6) W.u.Observation of this isomer, and lack of evidence in the currentwork for aIp=5-isomer decay in132In, provides a benchmark of the proton-neutron interaction in the regionof the nuclear chart “southeast” of132Sn, where experimental information on excited states is sparse., Postprint (author's final draft)

Published
2019

23. Observation of a mu s isomer in In-134(49)85: Proton-neutron coupling >southeast> of Sn-132(50)82

Author

RIKEN Nishina Center for Accelerator-Based Science, University of Tokyo, Department of Energy (US), National Nuclear Security Administration (US), National Science Foundation (US), University of Michigan, National Science Centre (Poland), Science and Technology Facilities Council (UK), Ministry of Human Capacities (Hungary), Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Economía y Competitividad (España), European Commission, National Research Foundation (South Africa), Natural Sciences and Engineering Research Council of Canada, National Research Council of Canada, Department for Business, Energy and Industrial Strategy (UK), National Natural Science Foundation of China, Vietnam Academy of Science and Technology, Phong, V.H., Lorusso, G., Davinson, T., Estrade, A., Hall, O., Liu, J., Matsui, K., Montes, F., Nishimura, S., Boso, A., Regan, P. H., Shearman, R., Xu, Z. Y., Agramunt, Jorge, Allmond, J. M., Ahn, D.S., Algora, Alejandro, Baba, H., Brewer, N. T., Bruno, C. G., Caballero-Folch, R., Calvino, F., Wolinska-Cichocka, M., Cortés, Guillem, Dillmann, I., Domingo Pardo, César, Gargano, A., Go, S., Griffin, C.J., Grzywacz, R. K., Harkness-Brennan, L.J., Isobe, T., Jungclaus, Andrea, Kahl, D., Khiem, L. H., Kiss, G., Korgul, A., Kubono, S., Miernik, K., Morales, Ana Isabel, Nepal, N., Piersa, M., Podolyák, Zs., Rasco, B. C., Rykaczewski K. P., Sakurai, H., Shimizu, Y., Stacener, D. W., Sumikama, T., Suzuki, H., Takeda, H., Taín, José Luis, Tarifeño-Saldivia, A., Tolosa-Delgado, A., Vaquero, Victor, Woods, P. J., Yokoyama, R., Yuan, C., RIKEN Nishina Center for Accelerator-Based Science, University of Tokyo, Department of Energy (US), National Nuclear Security Administration (US), National Science Foundation (US), University of Michigan, National Science Centre (Poland), Science and Technology Facilities Council (UK), Ministry of Human Capacities (Hungary), Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Economía y Competitividad (España), European Commission, National Research Foundation (South Africa), Natural Sciences and Engineering Research Council of Canada, National Research Council of Canada, Department for Business, Energy and Industrial Strategy (UK), National Natural Science Foundation of China, Vietnam Academy of Science and Technology, Phong, V.H., Lorusso, G., Davinson, T., Estrade, A., Hall, O., Liu, J., Matsui, K., Montes, F., Nishimura, S., Boso, A., Regan, P. H., Shearman, R., Xu, Z. Y., Agramunt, Jorge, Allmond, J. M., Ahn, D.S., Algora, Alejandro, Baba, H., Brewer, N. T., Bruno, C. G., Caballero-Folch, R., Calvino, F., Wolinska-Cichocka, M., Cortés, Guillem, Dillmann, I., Domingo Pardo, César, Gargano, A., Go, S., Griffin, C.J., Grzywacz, R. K., Harkness-Brennan, L.J., Isobe, T., Jungclaus, Andrea, Kahl, D., Khiem, L. H., Kiss, G., Korgul, A., Kubono, S., Miernik, K., Morales, Ana Isabel, Nepal, N., Piersa, M., Podolyák, Zs., Rasco, B. C., Rykaczewski K. P., Sakurai, H., Shimizu, Y., Stacener, D. W., Sumikama, T., Suzuki, H., Takeda, H., Taín, José Luis, Tarifeño-Saldivia, A., Tolosa-Delgado, A., Vaquero, Victor, Woods, P. J., Yokoyama, R., and Yuan, C.

Abstract

We report on the observation of a microsecond isomeric state in the single-proton-hole, three-neutron-particle nucleus In-134. The nuclei of interest were produced by in-flight fission of a U-238 beam at the Radioactive Isotope Beam Factory at RIKEN. The isomer depopulates through a gamma ray of energy 56.7(1) keV and with a half-life of T-1/2 = 3.5(4) mu s. Based on the comparison with shell-model calculations, we interpret the isomer as the I-pi = 5(-) member of the pi 0g(9/2)(-1) circle times nu 1f(7/2)(3) multiplet, decaying to the I-pi = 7(-) ground state with a reduced-transition probability of B(E2; 5(-) -> 7(-)) = 0.53(6) W.u. Observation of this isomer, and lack of evidence in the current work for a I-pi = 5(-) isomer decay in In-132, provides a benchmark of the proton-neutron interaction in the region of the nuclear chart >southeast> of Sn-132, where experimental information on excited states is sparse.

Published
2019

24. The ORNL analysis technique for extracting β-delayed multi-neutron branching ratios with BRIKEN

Author

Rasco, B.C., primary, Brewer, N.T., additional, Yokoyama, R., additional, Grzywacz, R., additional, Rykaczewski, K.P., additional, Tolosa-Delgado, A., additional, Agramunt, J., additional, Taín, J.L., additional, Algora, A., additional, Hall, O., additional, Griffin, C., additional, Davinson, T., additional, Phong, V.H., additional, Liu, J., additional, Nishimura, S., additional, Kiss, G.G., additional, Nepal, N., additional, and Estrade, A., additional

Published
2018
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25. The BRIKEN Project: Extensive Measurements of $\beta $-delayed Neutron Emitters for the Astrophysical r Process

Author

Tain, J.L., primary, Agramunt, J., additional, Ahn, D.S., additional, Algora, A., additional, Allmond, J.M., additional, Baba, H., additional, Bae, S., additional, Brewer, N.T., additional, Caballero Folch, R., additional, Calvino, F., additional, Coleman-Smith, P.J., additional, Cortes, G., additional, Davinson, T., additional, Dillmann, I., additional, Domingo-Pardo, C., additional, Estrade, A., additional, Fukuda, N., additional, Go, S., additional, Griffin, C., additional, Grzywacz, R., additional, Ha, J., additional, Hall, O., additional, Harkness-Brennan, L., additional, Isobe, T., additional, Kahl, D., additional, Karny, M., additional, Kiss, G.G., additional, Kogimtzis, M., additional, Korgul, A., additional, Kubono, S., additional, Labiche, M., additional, Lazarus, I., additional, Lee, J., additional, Liu, J., additional, Lorusso, G., additional, Matsui, K., additional, Miernik, K., additional, Montes, F., additional, Moon, B., additional, Morales, A.I., additional, Nepal, N., additional, Nishimura, S., additional, Page, R.D., additional, Podolyak, Z., additional, Pucknell, V.F.E., additional, Rasco, B.C., additional, Regan, P.H., additional, Riego, A., additional, Rubio, B., additional, Rykaczewski, K.P., additional, Saito, Y., additional, Sakurai, H., additional, Shimizu, Y., additional, Simpson, J., additional, Söderström, P.A., additional, Stracener, D.W., additional, Sumikama, T., additional, Surman, R., additional, Suzuki, H., additional, Takechi, M., additional, Takeda, H., additional, Tarifeno-Saldivia, A., additional, Thomas, S.L., additional, Tolosa-Delgado, A., additional, Phong, V.H., additional, and Woods, P., additional

Published
2018
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26. Conceptual design of a hybrid neutron-gamma detector for study of β-delayed neutrons at the RIB facility of RIKEN

Author

Tarifeño-Saldivia, A., primary, Tain, J.L., additional, Domingo-Pardo, C., additional, Calviño, F., additional, Cortés, G., additional, Phong, V.H., additional, Riego, A., additional, Agramunt, J., additional, Algora, A., additional, Brewer, N., additional, Caballero-Folch, R., additional, Coleman-Smith, P.J., additional, Davinson, T., additional, Dillmann, I., additional, Estradé, A., additional, Griffin, C.J., additional, Grzywacz, R., additional, Harkness-Brennan, L.J., additional, Kiss, G.G., additional, Kogimtzis, M., additional, Labiche, M., additional, Lazarus, I.H., additional, Lorusso, G., additional, Matsui, K., additional, Miernik, K., additional, Montes, F., additional, Morales, A.I., additional, Nishimura, S., additional, Page, R.D., additional, Podolyák, Z.S., additional, Pucknell, V.F.E., additional, Rasco, B.C., additional, Regan, P., additional, Rubio, B., additional, Rykaczewski, K.P., additional, Saito, Y., additional, Sakurai, H., additional, Simpson, J., additional, Sokol, E., additional, Surman, R., additional, Svirkhin, A., additional, Thomas, S.L., additional, Tolosa, A., additional, and Woods, P., additional

Published
2017
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27. Conceptual design of a hybrid neutron-gamma detector for study of ß-delayed neutrons at the RIB facility of RIKEN

Author

Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, 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, Tarifeño Saldivia, Ariel Esteban, Taín Enríquez, José Luis, Domingo Pardo, César, Calviño Tavares, Francisco, Cortés Rossell, Guillem Pere, Phong, V.H., Riego Pérez, Albert, Agramunt Ros, Jorge, Algora, A., Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, 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, Tarifeño Saldivia, Ariel Esteban, Taín Enríquez, José Luis, Domingo Pardo, César, Calviño Tavares, Francisco, Cortés Rossell, Guillem Pere, Phong, V.H., Riego Pérez, Albert, Agramunt Ros, Jorge, and Algora, A.

Abstract

The conceptual design of the BRIKEN neutron detector at the radioactive ion beam factory (RIBF) of the RIKEN Nishina Center is reported. The BRIKEN setup is a complex system aimed at detecting heavy-ion implants, ß particles, ¿ rays and ß-delayed neutrons. The whole setup includes the Advanced Implantation Detection Array (AIDA), two HPGe Clover detectors and up to 166 3He-filled counters embedded in a high-density polyethylene moderator. The design is quite complex due to the large number and different types of 3He-tubes involved and the additional constraints introduced by the ancillary detectors for charged particles and ¿ rays. This article reports on a novel methodology developed for the conceptual design and optimisation of the 3He-counter array, aiming for the best possible performance in terms of neutron detection. The algorithm is based on a geometric representation of two selected detector parameters of merit, namely, the average neutron detection efficiency and the efficiency flatness as a function of a reduced number of geometric variables. The response of the neutron detector is obtained from a systematic Monte Carlo simulation implemented in GEANT4. The robustness of the algorithm allowed us to design a versatile detection system, which operated in hybrid mode includes the full neutron counter and two clover detectors for high-precision gamma spectroscopy. In addition, the system can be reconfigured into a compact mode by removing the clover detectors and re-arranging the 3He tubes in order to maximize the neutron detection performance. Both operation modes shows a rather flat and high average efficiency. In summary, we have designed a system which shows an average efficiency for hybrid mode (3He tubes + clovers) of 68.6% and 64% for neutron energies up to 1 and 5 MeV, respectively. For compact mode (only 3He tubes), the average efficiency is 75.7% and 71% for neutron energies up to 1 and 5 MeV, respectively. The performance of the BRIKEN detection sys, Postprint (author's final draft)

Published
2017

28. Isomer Spectroscopy of Neutron-rich $^{165,167}$Tb

Author

Gurgi, L.A., primary, Regan, P.H., additional, Söderström, P.-A., additional, Watanabe, H., additional, Walker, P.M., additional, Podolyák, Zs., additional, Nishimura, S., additional, Berry, T.A., additional, Doornenbal, P., additional, Lorusso, G., additional, Isobe, T., additional, Baba, H., additional, Xu, Z.Y., additional, Sakurai, H., additional, Sumikama, T., additional, Catford, W.N., additional, Bruce, A.M., additional, Browne, F., additional, Lane, G.J., additional, Kondev, F.G., additional, Odahara, A., additional, Wu, J., additional, Liu, H.L., additional, Xu, F.R., additional, Korkulu, Z., additional, Lee, P., additional, Liu, J.J., additional, Phong, V.H., additional, Yagi, A., additional, Zhang, G.X., additional, Alharbi, T., additional, Carroll, R.J., additional, Chae, K.Y., additional, Dombradi, Zs., additional, Estrade, A., additional, Fukuda, N., additional, Griffin, C., additional, Ideguchi, E., additional, Inabe, N., additional, Kanaoka, H., additional, Kojouharov, I., additional, Kubo, T., additional, Kubono, S., additional, Kurz, N., additional, Kuti, I., additional, Lalkovski, S., additional, Lee, E.J., additional, Lee, C.S., additional, Lotay, G., additional, Moon, C.B., additional, Nishizuka, I., additional, Nita, C.R., additional, Patel, Z., additional, Roberts, O.J., additional, Schaffner, H., additional, Shand, C.M., additional, Suzuki, H., additional, Takeda, H., additional, Terashima, S., additional, Vajta, Zs., additional, Kanaya, S., additional, and Valiente-Dobón, J.J., additional

Published
2017
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29. K-mixing in the doubly mid-shell nuclide 170Dy and the role of vibrational degeneracy

Author

Söderström, P.-A., primary, Walker, P.M., additional, Wu, J., additional, Liu, H.L., additional, Regan, P.H., additional, Watanabe, H., additional, Doornenbal, P., additional, Korkulu, Z., additional, Lee, P., additional, Liu, J.J., additional, Lorusso, G., additional, Nishimura, S., additional, Phong, V.H., additional, Sumikama, T., additional, Xu, F.R., additional, Yagi, A., additional, Zhang, G.X., additional, Ahn, D.S., additional, Alharbi, T., additional, Baba, H., additional, Browne, F., additional, Bruce, A.M., additional, Carroll, R.J., additional, Chae, K.Y., additional, Dombradi, Zs., additional, Estrade, A., additional, Fukuda, N., additional, Griffin, C.J., additional, Ideguchi, E., additional, Inabe, N., additional, Isobe, T., additional, Kanaoka, H., additional, Kanaya, S., additional, Kojouharov, I., additional, Kondev, F.G., additional, Kubo, T., additional, Kubono, S., additional, Kurz, N., additional, Kuti, I., additional, Lalkovski, S., additional, Lane, G.J., additional, Lee, E.J., additional, Lee, C.S., additional, Lotay, G., additional, Moon, C.-B., additional, Nishizuka, I., additional, Niţă, C.R., additional, Odahara, A., additional, Patel, Z., additional, Podolyák, Zs., additional, Roberts, O.J., additional, Sakurai, H., additional, Schaffner, H., additional, Shand, C.M., additional, Suzuki, H., additional, Takeda, H., additional, Terashima, S., additional, Vajta, Zs., additional, Valiente-Dòbon, J.J., additional, and Xu, Z.Y., additional

Published
2016
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30. Long-lived K isomer and enhanced γ vibration in the neutron-rich nucleus 172Dy: Collectivity beyond double midshell

Author

Watanabe, H., primary, Zhang, G.X., additional, Yoshida, K., additional, Walker, P.M., additional, Liu, J.J., additional, Wu, J., additional, Regan, P.H., additional, Söderström, P.-A., additional, Kanaoka, H., additional, Korkulu, Z., additional, Lee, P.S., additional, Nishimura, S., additional, Yagi, A., additional, Ahn, D.S., additional, Alharbi, T., additional, Baba, H., additional, Browne, F., additional, Bruce, A.M., additional, Carroll, R.J., additional, Chae, K.Y., additional, Dombradi, Zs., additional, Doornenbal, P., additional, Estrade, A., additional, Fukuda, N., additional, Griffin, C., additional, Ideguchi, E., additional, Inabe, N., additional, Isobe, T., additional, Kanaya, S., additional, Kojouharov, I., additional, Kondev, F.G., additional, Kubo, T., additional, Kubono, S., additional, Kurz, N., additional, Kuti, I., additional, Lalkovski, S., additional, Lane, G.J., additional, Lee, C.S., additional, Lee, E.J., additional, Lorusso, G., additional, Lotay, G., additional, Moon, C.-B., additional, Nishizuka, I., additional, Nita, C.R., additional, Odahara, A., additional, Patel, Z., additional, Phong, V.H., additional, Podolyák, Zs., additional, Roberts, O.J., additional, Sakurai, H., additional, Schaffner, H., additional, Shand, C.M., additional, Shimizu, Y., additional, Sumikama, T., additional, Suzuki, H., additional, Takeda, H., additional, Terashima, S., additional, Vajta, Zs., additional, Valiente-Dóbon, J.J., additional, and Xu, Z.Y., additional

Published
2016
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31. Observation of a us isomer in 134-In: Proton-neutron coupling 'southeast' of 132-Sn

Author

Phong, V.H., Lorusso, G., Calviño Tavares, Francisco, Cortés Rossell, Guillem Pere, Tarifeño Saldivia, Ariel Esteban, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group

Subjects
Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, RIKEN, Física [Àrees temàtiques de la UPC], Nuclear physics, Física nuclear, Decay, Neutron rich
Abstract

We report on the observation of a microsecond isomeric state in the single-proton-hole, three-neutron-particlenucleus134In. The nuclei of interest were produced by in-flight fission of a238U beam at the Radioactive IsotopeBeam Factory at RIKEN. The isomer depopulates through a¿ray of energy 56.7(1) keV and with a half-life ofT1/2=3.5(4)µs. Based on the comparison with shell-model calculations, we interpret the isomer as theIp=5-member of thep0g-19/2¿¿1f37/2multiplet, decaying to theIp=7-ground state with a reduced-transitionprobability ofB(E2; 5-¿7-)=0.53(6) W.u.Observation of this isomer, and lack of evidence in the currentwork for aIp=5-isomer decay in132In, provides a benchmark of the proton-neutron interaction in the regionof the nuclear chart “southeast” of132Sn, where experimental information on excited states is sparse.

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