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

^*Corresponding author for this work

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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 - 10 May 2019

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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{29c9528dd1674f5a8b86351e8fbe70ea,

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 - http://www.scopus.com/inward/record.url?scp=85063762429&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2019.03.053

DO - 10.1016/j.physletb.2019.03.053

M3 - Article

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

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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