Particle- γ coincidence spectroscopy of the N = 90 nucleus 154Gd by (p, tγ)

J. M. Allmond; C. W. Beausang; T. J. Ross; P. Humby; M. S. Basunia; L. A. Bernstein; D. L. Bleuel; W. Brooks; N. Brown; J. T. Burke; B. K. Darakchieva; K. R. Dudziak; K. E. Evans; P. Fallon; H. B. Jeppesen; J. D. LeBlanc; S. R. Lesher; M. A. McMahan; D. A. Meyer; L. Phair; J. O. Rasmussen; N. D. Scielzo; S. R. Stroberg; M. Wiedeking

doi:10.1140/epja/i2017-12253-2

Particle- γ coincidence spectroscopy of the N = 90 nucleus ¹⁵⁴Gd by (p, tγ)

J. M. Allmond
, C. W. Beausang
, T. J. Ross
, P. Humby
, M. S. Basunia
, L. A. Bernstein
, D. L. Bleuel
, W. Brooks
, N. Brown
, J. T. Burke
, B. K. Darakchieva
, K. R. Dudziak
, K. E. Evans
, P. Fallon
, H. B. Jeppesen
, J. D. LeBlanc
, S. R. Lesher
, M. A. McMahan
, D. A. Meyer
, L. Phair

J. O. Rasmussen, N. D. Scielzo, S. R. Stroberg, M. Wiedeking

Nuclear Structure and Nuclear Astrophysi

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

3 Scopus citations

Abstract

A segmented Si-telescope and HPGe array, STARS-LIBERACE, was used to study the ¹⁵⁶Gd(p, tγ)¹⁵⁴Gd direct reaction by particle- γ coincidence spectroscopy. New cross sections with a 25MeV proton beam are reported and compared to previous (p,t) and (t,p) studies. Furthermore, additional evidence for coexisting Kπ=01+,21+ and 02+, 22+ configurations at N = 90 is presented. Direct and indirect population patterns of the low-lying states are also explored. Review of the new and existing evidence favors an interpretation based on a configuration-dependent pairing interaction. The weakening of monopole pairing strength and an increase in quadrupole pairing strength could bring 2p-2h 0 ⁺ states below 2 Δ. This may account for a large number of the low-lying 0 ⁺ states observed in two-nucleon transfer reactions. A hypothesis for the origin of the 02+ and 03+ states is provided.

Original language	English
Article number	62
Journal	European Physical Journal A
Volume	53
Issue number	3
DOIs	https://doi.org/10.1140/epja/i2017-12253-2
State	Published - Mar 1 2017

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Allmond, J. M., Beausang, C. W., Ross, T. J., Humby, P., Basunia, M. S., Bernstein, L. A., Bleuel, D. L., Brooks, W., Brown, N., Burke, J. T., Darakchieva, B. K., Dudziak, K. R., Evans, K. E., Fallon, P., Jeppesen, H. B., LeBlanc, J. D., Lesher, S. R., McMahan, M. A., Meyer, D. A., ... Wiedeking, M. (2017). Particle- γ coincidence spectroscopy of the N = 90 nucleus ¹⁵⁴Gd by (p, tγ). European Physical Journal A, 53(3), Article 62. https://doi.org/10.1140/epja/i2017-12253-2

@article{cfde013fae0f4cde917deb00546e9d7c,

title = "Particle- γ coincidence spectroscopy of the N = 90 nucleus 154Gd by (p, tγ)",

abstract = "A segmented Si-telescope and HPGe array, STARS-LIBERACE, was used to study the 156Gd(p, tγ)154Gd direct reaction by particle- γ coincidence spectroscopy. New cross sections with a 25MeV proton beam are reported and compared to previous (p,t) and (t,p) studies. Furthermore, additional evidence for coexisting Kπ=01+,21+ and 02+, 22+ configurations at N = 90 is presented. Direct and indirect population patterns of the low-lying states are also explored. Review of the new and existing evidence favors an interpretation based on a configuration-dependent pairing interaction. The weakening of monopole pairing strength and an increase in quadrupole pairing strength could bring 2p-2h 0 + states below 2 Δ. This may account for a large number of the low-lying 0 + states observed in two-nucleon transfer reactions. A hypothesis for the origin of the 02+ and 03+ states is provided.",

author = "Allmond, \{J. M.\} and Beausang, \{C. W.\} and Ross, \{T. J.\} and P. Humby and Basunia, \{M. S.\} and Bernstein, \{L. A.\} and Bleuel, \{D. L.\} and W. Brooks and N. Brown and Burke, \{J. T.\} and Darakchieva, \{B. K.\} and Dudziak, \{K. R.\} and Evans, \{K. E.\} and P. Fallon and Jeppesen, \{H. B.\} and LeBlanc, \{J. D.\} and Lesher, \{S. R.\} and McMahan, \{M. A.\} and Meyer, \{D. A.\} and L. Phair and Rasmussen, \{J. O.\} and Scielzo, \{N. D.\} and Stroberg, \{S. R.\} and M. Wiedeking",

note = "Publisher Copyright: {\textcopyright} 2017, SIF, Springer-Verlag Berlin Heidelberg.",

year = "2017",

month = mar,

day = "1",

doi = "10.1140/epja/i2017-12253-2",

language = "English",

volume = "53",

journal = "European Physical Journal A",

issn = "1434-6001",

publisher = "Springer",

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Allmond, JM, Beausang, CW, Ross, TJ, Humby, P, Basunia, MS, Bernstein, LA, Bleuel, DL, Brooks, W, Brown, N, Burke, JT, Darakchieva, BK, Dudziak, KR, Evans, KE, Fallon, P, Jeppesen, HB, LeBlanc, JD, Lesher, SR, McMahan, MA, Meyer, DA, Phair, L, Rasmussen, JO, Scielzo, ND, Stroberg, SR & Wiedeking, M 2017, 'Particle- γ coincidence spectroscopy of the N = 90 nucleus ¹⁵⁴Gd by (p, tγ)', European Physical Journal A, vol. 53, no. 3, 62. https://doi.org/10.1140/epja/i2017-12253-2

TY - JOUR

T1 - Particle- γ coincidence spectroscopy of the N = 90 nucleus 154Gd by (p, tγ)

AU - Allmond, J. M.

AU - Beausang, C. W.

AU - Ross, T. J.

AU - Humby, P.

AU - Basunia, M. S.

AU - Bernstein, L. A.

AU - Bleuel, D. L.

AU - Brooks, W.

AU - Brown, N.

AU - Burke, J. T.

AU - Darakchieva, B. K.

AU - Dudziak, K. R.

AU - Evans, K. E.

AU - Fallon, P.

AU - Jeppesen, H. B.

AU - LeBlanc, J. D.

AU - Lesher, S. R.

AU - McMahan, M. A.

AU - Meyer, D. A.

AU - Phair, L.

AU - Rasmussen, J. O.

AU - Scielzo, N. D.

AU - Stroberg, S. R.

AU - Wiedeking, M.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - A segmented Si-telescope and HPGe array, STARS-LIBERACE, was used to study the 156Gd(p, tγ)154Gd direct reaction by particle- γ coincidence spectroscopy. New cross sections with a 25MeV proton beam are reported and compared to previous (p,t) and (t,p) studies. Furthermore, additional evidence for coexisting Kπ=01+,21+ and 02+, 22+ configurations at N = 90 is presented. Direct and indirect population patterns of the low-lying states are also explored. Review of the new and existing evidence favors an interpretation based on a configuration-dependent pairing interaction. The weakening of monopole pairing strength and an increase in quadrupole pairing strength could bring 2p-2h 0 + states below 2 Δ. This may account for a large number of the low-lying 0 + states observed in two-nucleon transfer reactions. A hypothesis for the origin of the 02+ and 03+ states is provided.

AB - A segmented Si-telescope and HPGe array, STARS-LIBERACE, was used to study the 156Gd(p, tγ)154Gd direct reaction by particle- γ coincidence spectroscopy. New cross sections with a 25MeV proton beam are reported and compared to previous (p,t) and (t,p) studies. Furthermore, additional evidence for coexisting Kπ=01+,21+ and 02+, 22+ configurations at N = 90 is presented. Direct and indirect population patterns of the low-lying states are also explored. Review of the new and existing evidence favors an interpretation based on a configuration-dependent pairing interaction. The weakening of monopole pairing strength and an increase in quadrupole pairing strength could bring 2p-2h 0 + states below 2 Δ. This may account for a large number of the low-lying 0 + states observed in two-nucleon transfer reactions. A hypothesis for the origin of the 02+ and 03+ states is provided.

UR - https://www.scopus.com/pages/publications/85016240777

U2 - 10.1140/epja/i2017-12253-2

DO - 10.1140/epja/i2017-12253-2

M3 - Article

AN - SCOPUS:85016240777

SN - 1434-6001

VL - 53

JO - European Physical Journal A

JF - European Physical Journal A

IS - 3

M1 - 62

ER -

Particle- γ coincidence spectroscopy of the N = 90 nucleus ¹⁵⁴Gd by (p, tγ)

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