New isomers in                          125                         Pd                         79                          and                          127                         Pd                         81: Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure

H. Watanabe; H. K. Wang; G. Lorusso; S. Nishimura; Z. Y. Xu; T. Sumikama; P. A. Söderström; P. Doornenbal; F. Browne; G. Gey; H. S. Jung; J. Taprogge; Zs Vajta; J. Wu; A. Yagi; H. Baba; G. Benzoni; K. Y. Chae; F. C.L. Crespi; N. Fukuda; R. Gernhäuser; N. Inabe; T. Isobe; A. Jungclaus; D. Kameda; G. D. Kim; Y. K. Kim; I. Kojouharov; F. G. Kondev; T. Kubo; N. Kurz; Y. K. Kwon; G. J. Lane; Z. Li; C. B. Moon; A. Montaner-Pizá; K. Moschner; F. Naqvi; M. Niikura; H. Nishibata; D. Nishimura; A. Odahara; R. Orlandi; Z. Patel; Zs Podolyák; H. Sakurai; H. Schaffner; G. S. Simpson; K. Steiger; Y. Sun; H. Suzuki; H. Takeda; A. Wendt; K. Yoshinaga

doi:10.1016/j.physletb.2019.03.053

New isomers in ¹²⁵ Pd ₇₉ and ¹²⁷ Pd ₈₁: Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure

H. Watanabe, H. K. Wang, G. Lorusso, S. Nishimura, Z. Y. Xu, T. Sumikama, P. A. Söderström, P. Doornenbal, F. Browne, G. Gey, H. S. Jung, J. Taprogge, Zs Vajta, J. Wu, A. Yagi, H. Baba, G. Benzoni, K. Y. Chae, F. C.L. Crespi, N. FukudaR. Gernhäuser, N. Inabe, T. Isobe, A. Jungclaus, D. Kameda, G. D. Kim, Y. K. Kim, I. Kojouharov, F. G. Kondev, T. Kubo, N. Kurz, Y. K. Kwon, G. J. Lane, Z. Li, C. B. Moon, A. Montaner-Pizá, K. Moschner, F. Naqvi, M. Niikura, H. Nishibata, D. Nishimura, A. Odahara, R. Orlandi, Z. Patel, Zs Podolyák, H. Sakurai, H. Schaffner, G. S. Simpson, K. Steiger, Y. Sun, H. Suzuki, H. Takeda, A. Wendt, K. Yoshinaga

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The neutron-rich isotopes of palladium have attracted considerable interest in terms of the evolution of the N=82 neutron shell closure and its influence on the r-process nucleosynthesis. In this Letter, we present the first spectroscopic information on the excited states in ¹²⁵ Pd ₇₉ and ¹²⁷ Pd ₈₁ studied using the EURICA γ-ray spectrometer, following production via in-flight fission of a high-intensity ²³⁸ U beam at the RIBF facility. New isomeric states with half-lives of 144(4) ns and 39(6) μs have been assigned spins and parities of (23/2 ⁺ ) and (19/2 ⁺ ) in ¹²⁵ Pd and ¹²⁷ Pd, respectively. The observed level properties are compared to a shell-model calculation, suggesting the competition between proton excitations and neutron excitations in the proton-hole and neutron-hole systems in the vicinity of the doubly magic nucleus ¹³² Sn.

Original language	English
Pages (from-to)	263-268
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	792
DOIs	https://doi.org/10.1016/j.physletb.2019.03.053
Publication status	Published - May 10 2019
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/j.physletb.2019.03.053

Cite this

Watanabe, H., Wang, H. K., Lorusso, G., Nishimura, S., Xu, Z. Y., Sumikama, T., Söderström, P. A., Doornenbal, P., Browne, F., Gey, G., Jung, H. S., Taprogge, J., Vajta, Z., Wu, J., Yagi, A., Baba, H., Benzoni, G., Chae, K. Y., Crespi, F. C. L., ... Yoshinaga, K. (2019). New isomers in ¹²⁵ Pd ₇₉ and ¹²⁷ Pd ₈₁: Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 792, 263-268. https://doi.org/10.1016/j.physletb.2019.03.053

New isomers in ¹²⁵ Pd ₇₉ and ¹²⁷ Pd ₈₁: Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure. / Watanabe, H.; Wang, H. K.; Lorusso, G. et al.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 792, 10.05.2019, p. 263-268.

Research output: Contribution to journal › Article › peer-review

Watanabe, H, Wang, HK, Lorusso, G, Nishimura, S, Xu, ZY, Sumikama, T, Söderström, PA, Doornenbal, P, Browne, F, Gey, G, Jung, HS, Taprogge, J, Vajta, Z, Wu, J, Yagi, A, Baba, H, Benzoni, G, Chae, KY, Crespi, FCL, Fukuda, N, Gernhäuser, R, Inabe, N, Isobe, T, Jungclaus, A, Kameda, D, Kim, GD, Kim, YK, Kojouharov, I, Kondev, FG, Kubo, T, Kurz, N, Kwon, YK, Lane, GJ, Li, Z, Moon, CB, Montaner-Pizá, A, Moschner, K, Naqvi, F, Niikura, M, Nishibata, H, Nishimura, D, Odahara, A, Orlandi, R, Patel, Z, Podolyák, Z, Sakurai, H, Schaffner, H, Simpson, GS, Steiger, K, Sun, Y, Suzuki, H, Takeda, H, Wendt, A & Yoshinaga, K 2019, 'New isomers in ¹²⁵ Pd ₇₉ and ¹²⁷ Pd ₈₁: Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 792, pp. 263-268. https://doi.org/10.1016/j.physletb.2019.03.053

Watanabe H, Wang HK, Lorusso G, Nishimura S, Xu ZY, Sumikama T et al. New isomers in ¹²⁵ Pd ₇₉ and ¹²⁷ Pd ₈₁: Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2019 May 10;792:263-268. doi: 10.1016/j.physletb.2019.03.053

Watanabe, H. ; Wang, H. K. ; Lorusso, G. et al. / New isomers in ¹²⁵ Pd ₇₉ and ¹²⁷ Pd ₈₁ : Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2019 ; Vol. 792. pp. 263-268.

@article{74fd828645cc455bb99b5d62a0457ba0,

title = "New isomers in 125 Pd 79 and 127 Pd 81: Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure",

abstract = " The neutron-rich isotopes of palladium have attracted considerable interest in terms of the evolution of the N=82 neutron shell closure and its influence on the r-process nucleosynthesis. In this Letter, we present the first spectroscopic information on the excited states in 125 Pd 79 and 127 Pd 81 studied using the EURICA γ-ray spectrometer, following production via in-flight fission of a high-intensity 238 U beam at the RIBF facility. New isomeric states with half-lives of 144(4) ns and 39(6) μs have been assigned spins and parities of (23/2 + ) and (19/2 + ) in 125 Pd and 127 Pd, respectively. The observed level properties are compared to a shell-model calculation, suggesting the competition between proton excitations and neutron excitations in the proton-hole and neutron-hole systems in the vicinity of the doubly magic nucleus 132 Sn.",

author = "H. Watanabe and Wang, {H. K.} and G. Lorusso and S. Nishimura and Xu, {Z. Y.} and T. Sumikama and S{\"o}derstr{\"o}m, {P. A.} and P. Doornenbal and F. Browne and G. Gey and Jung, {H. S.} and J. Taprogge and Zs Vajta and J. Wu and A. Yagi and H. Baba and G. Benzoni and Chae, {K. Y.} and Crespi, {F. C.L.} and N. Fukuda and R. Gernh{\"a}user and N. Inabe and T. Isobe and A. Jungclaus and D. Kameda and Kim, {G. D.} and Kim, {Y. K.} and I. Kojouharov and Kondev, {F. G.} and T. Kubo and N. Kurz and Kwon, {Y. K.} and Lane, {G. J.} and Z. Li and Moon, {C. B.} and A. Montaner-Piz{\'a} and K. Moschner and F. Naqvi and M. Niikura and H. Nishibata and D. Nishimura and A. Odahara and R. Orlandi and Z. Patel and Zs Podoly{\'a}k and H. Sakurai and H. Schaffner and Simpson, {G. S.} and K. Steiger and Y. Sun and H. Suzuki and H. Takeda and A. Wendt and K. Yoshinaga",

note = "Funding Information: We thank the staff at RIBF for providing the beams, the EUROBALL Owners Committee for the loan of germanium detectors, the PreSpec Collaboration for the use of the readout electronics. Part of the WAS3ABi was supported by the Rare Isotope Science Project which is funded by MSIP and NRF of Korea. This work was supported by the Priority Centers Research Program in Korea (2009-0093817), OTKA contract number K100835, the U.S. DOE, Office of Nuclear Physics (Contract No. DE-AC02-06CH11357), NRF-2016R1A5A1013277 and NRF-2013M7A1A1075764, the Spanish Ministerio de Econom{\'i}a y Competitividad under contract FPA2017-84756-C4-2-P, the European Commission through the Marie Curie Actions call FP7-PEOPLE-2011-IEF (Contract No. 300096), German BMBF under Contract No: 05P12PKFNE, JSPS KAKENHI Grant No. 24740188 and 25247045, the National Natural Science Foundation of China (Nos. 11505302, 11575112), the National Key Program for S&T Research and Development (No. 2016YFA0400501), and STFC (UK). Publisher Copyright: {\textcopyright} 2019 The Author(s)",

year = "2019",

month = may,

day = "10",

doi = "10.1016/j.physletb.2019.03.053",

language = "English",

volume = "792",

pages = "263--268",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

}

TY - JOUR

T1 - New isomers in 125 Pd 79 and 127 Pd 81

T2 - Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure

AU - Watanabe, H.

AU - Wang, H. K.

AU - Lorusso, G.

AU - Nishimura, S.

AU - Xu, Z. Y.

AU - Sumikama, T.

AU - Söderström, P. A.

AU - Doornenbal, P.

AU - Browne, F.

AU - Gey, G.

AU - Jung, H. S.

AU - Taprogge, J.

AU - Vajta, Zs

AU - Wu, J.

AU - Yagi, A.

AU - Baba, H.

AU - Benzoni, G.

AU - Chae, K. Y.

AU - Crespi, F. C.L.

AU - Fukuda, N.

AU - Gernhäuser, R.

AU - Inabe, N.

AU - Isobe, T.

AU - Jungclaus, A.

AU - Kameda, D.

AU - Kim, G. D.

AU - Kim, Y. K.

AU - Kojouharov, I.

AU - Kondev, F. G.

AU - Kubo, T.

AU - Kurz, N.

AU - Kwon, Y. K.

AU - Lane, G. J.

AU - Li, Z.

AU - Moon, C. B.

AU - Montaner-Pizá, A.

AU - Moschner, K.

AU - Naqvi, F.

AU - Niikura, M.

AU - Nishibata, H.

AU - Nishimura, D.

AU - Odahara, A.

AU - Orlandi, R.

AU - Patel, Z.

AU - Podolyák, Zs

AU - Sakurai, H.

AU - Schaffner, H.

AU - Simpson, G. S.

AU - Steiger, K.

AU - Sun, Y.

AU - Suzuki, H.

AU - Takeda, H.

AU - Wendt, A.

AU - Yoshinaga, K.

N1 - Funding Information: We thank the staff at RIBF for providing the beams, the EUROBALL Owners Committee for the loan of germanium detectors, the PreSpec Collaboration for the use of the readout electronics. Part of the WAS3ABi was supported by the Rare Isotope Science Project which is funded by MSIP and NRF of Korea. This work was supported by the Priority Centers Research Program in Korea (2009-0093817), OTKA contract number K100835, the U.S. DOE, Office of Nuclear Physics (Contract No. DE-AC02-06CH11357), NRF-2016R1A5A1013277 and NRF-2013M7A1A1075764, the Spanish Ministerio de Economía y Competitividad under contract FPA2017-84756-C4-2-P, the European Commission through the Marie Curie Actions call FP7-PEOPLE-2011-IEF (Contract No. 300096), German BMBF under Contract No: 05P12PKFNE, JSPS KAKENHI Grant No. 24740188 and 25247045, the National Natural Science Foundation of China (Nos. 11505302, 11575112), the National Key Program for S&T Research and Development (No. 2016YFA0400501), and STFC (UK). Publisher Copyright: © 2019 The Author(s)

PY - 2019/5/10

Y1 - 2019/5/10

N2 - The neutron-rich isotopes of palladium have attracted considerable interest in terms of the evolution of the N=82 neutron shell closure and its influence on the r-process nucleosynthesis. In this Letter, we present the first spectroscopic information on the excited states in 125 Pd 79 and 127 Pd 81 studied using the EURICA γ-ray spectrometer, following production via in-flight fission of a high-intensity 238 U beam at the RIBF facility. New isomeric states with half-lives of 144(4) ns and 39(6) μs have been assigned spins and parities of (23/2 + ) and (19/2 + ) in 125 Pd and 127 Pd, respectively. The observed level properties are compared to a shell-model calculation, suggesting the competition between proton excitations and neutron excitations in the proton-hole and neutron-hole systems in the vicinity of the doubly magic nucleus 132 Sn.

AB - The neutron-rich isotopes of palladium have attracted considerable interest in terms of the evolution of the N=82 neutron shell closure and its influence on the r-process nucleosynthesis. In this Letter, we present the first spectroscopic information on the excited states in 125 Pd 79 and 127 Pd 81 studied using the EURICA γ-ray spectrometer, following production via in-flight fission of a high-intensity 238 U beam at the RIBF facility. New isomeric states with half-lives of 144(4) ns and 39(6) μs have been assigned spins and parities of (23/2 + ) and (19/2 + ) in 125 Pd and 127 Pd, respectively. The observed level properties are compared to a shell-model calculation, suggesting the competition between proton excitations and neutron excitations in the proton-hole and neutron-hole systems in the vicinity of the doubly magic nucleus 132 Sn.

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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ER -

New isomers in ¹²⁵ Pd ₇₉ and ¹²⁷ Pd ₈₁: Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure

Abstract

All Science Journal Classification (ASJC) codes

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New isomers in 125 Pd 79 and 127 Pd 81: Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure

Abstract

All Science Journal Classification (ASJC) codes

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New isomers in ¹²⁵ Pd ₇₉ and ¹²⁷ Pd ₈₁: Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure