Morales, A. I., Algora, A., Rubio, B., Kaneko, K., Nishimura, S., Aguilera, P., Orrigo, S. E. A., Molina, F., de Angelis, G., Recchia, F., Kiss, G., Phong, V. H., Wu, J., Nishimura, D., Oikawa, H., Goigoux, T., Giovinazzo, J., Ascher, P., Agramunt, J., Ahn, D. S., Baba, H., Blank, B., Borcea, C., Boso, A., Davies, P., Diel, F., Dombardi, Zs., Doornenbal, P., Eberth, J., de France, G., Fujita, Y., Fukuda, N., Ganioglu, E., Gelletly, W., Gerbaux, M., Grevy, S., Guadilla, V., Inabe, N., Isobe, T., Kojouharov, I., Korten, W., Kubo, T., Kubono, S., Nieto, T. Kurtukian, Kurz, N., Lee, J., Lenzi, S., Liu, J., Lokotko, T., Lubos, D., Magron, C., Montaner-Piza, A., Napoli, D. R., Sakurai, H., Schaffner, H., Shimizu, Y., Sidong, C., Soderstrom, P. -A., Sumikama, T., Suzuki, H., Takeda, H., Takei, Y., Tanaka, M. and Yagi, S. (2017). Simultaneous investigation of the T=1(J(pi)=0(+)) and T=0(J(pi)=9(+)) beta decays in Br-70. Phys. Rev. C, 95 (6). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9993

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Abstract

The beta decay of the odd-odd nucleus Br-70 has been investigated with the BigRIPS and EURICA setups at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center. The T = 0(J(pi) = 9(+)) and T = 1(J(pi) = 0(+)) isomers have both been produced in in-flight fragmentation of Kr-78 with ratios of 41.6(8)% and 58.4(8)%, respectively. A half-life of t(1/2) = 2157(-49)(+53) ms has been measured for the J pi = 9(+) isomer from gamma-ray time decay analysis. Based on this result, we provide a new value of the half-life for the J pi = 0(+) ground state of Br-70, t(1/2) = 78.42 +/- 0.51 ms, which is slightly more precise, and in excellent agreement, with the best measurement reported hitherto in the literature. For this decay, we provide the first estimate of the total branching fraction decaying through the 2(1)(+) state in the daughter nucleus Se-70, R(2(1)(+)) = 1.3 +/- 1.1%. We also report four new low-intensity gamma-ray transitions at 661, 1103, 1561, and 1749 keV following the beta decay of the J pi = 9(+) isomer. Based on their coincidence relationships, we tentatively propose two new excited states at 3945 and 4752 keV in 70Se with most probable spins and parities of J(pi) = (6(+)) and (8(+)), respectively. The observed structure is interpreted with the help of shell-model calculations, which predict a complex interplay between oblate and prolate configurations at low excitation energies.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Morales, A. I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Algora, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rubio, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kaneko, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nishimura, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aguilera, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Orrigo, S. E. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Molina, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Angelis, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Recchia, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kiss, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Phong, V. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wu, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nishimura, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Oikawa, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goigoux, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Giovinazzo, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ascher, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Agramunt, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ahn, D. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Baba, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blank, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Borcea, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Boso, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Davies, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Diel, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dombardi, Zs.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Doornenbal, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eberth, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de France, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fujita, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fukuda, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ganioglu, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gelletly, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gerbaux, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grevy, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guadilla, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Inabe, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Isobe, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kojouharov, I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korten, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kubo, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kubono, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nieto, T. KurtukianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kurz, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lenzi, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lokotko, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lubos, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Magron, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Montaner-Piza, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Napoli, D. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sakurai, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schaffner, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shimizu, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sidong, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Soderstrom, P. -A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sumikama, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Suzuki, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Takeda, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Takei, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tanaka, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yagi, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-227173
DOI: 10.1103/PhysRevC.95.064327
Journal or Publication Title: Phys. Rev. C
Volume: 95
Number: 6
Date: 2017
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9993
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SHAPE COEXISTENCE; HALF-LIVES; HIGH-SPIN; NUCLEI; IDENTIFICATION; EVOLUTION; STATES; SE-70; AS-66; BEAMSMultiple languages
Physics, NuclearMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/22717

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