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. 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

Department of Physics

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

5 Scopus citations

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
State	Published - 10 May 2019

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10.1016/j.physletb.2019.03.053

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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

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{8a8b0ba5dd4d43e493b5607f27edf1dc,

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 = "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 B.V.",

}

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

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

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.

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.

UR - https://www.scopus.com/pages/publications/85063762429

U2 - 10.1016/j.physletb.2019.03.053

DO - 10.1016/j.physletb.2019.03.053

M3 - Article

AN - SCOPUS:85063762429

SN - 0370-2693

VL - 792

SP - 263

EP - 268

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

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

ER -

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

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

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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

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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