Half-lives of ground and isomeric states in 97Cd and the astrophysical origin of 96Ru

G. Lorusso; A. Becerril; A. Amthor; T. Baumann; D. Bazin; J. S. Berryman; B. A. Brown; R. H. Cyburt; H. L. Crawford; A. Estrade; A. Gade; T. Ginter; C. J. Guess; M. Hausmann; G. W. Hitt; P. F. Mantica; M. Matos; R. Meharchand; K. Minamisono; F. Montes; G. Perdikakis; J. Pereira; M. Portillo; H. Schatz; K. Smith; J. Stoker; A. Stolz; R. G.T. Zegers

doi:10.1016/j.physletb.2011.03.043

Half-lives of ground and isomeric states in ⁹⁷Cd and the astrophysical origin of ⁹⁶Ru

G. Lorusso, A. Becerril, A. Amthor, T. Baumann, D. Bazin, J. S. Berryman, B. A. Brown, R. H. Cyburt, H. L. Crawford, A. Estrade, A. Gade, T. Ginter, C. J. Guess, M. Hausmann, G. W. Hitt, P. F. Mantica, M. Matos, R. Meharchand, K. Minamisono, F. MontesG. Perdikakis, J. Pereira, M. Portillo, H. Schatz, K. Smith, J. Stoker, A. Stolz, R. G.T. Zegers

Physics

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Abstract

First experimental evidence for a high-spin isomer (25/2+) in ⁹⁷Cd, a waiting point in the astrophysical rapid proton capture process, is presented. The data were obtained in β-decay studies at NSCL using the new RF Fragment Separator system and detecting β-delayed protons and β-delayed γ rays. Decays from ground and isomeric states were disentangled, and proton emission branches were determined for the first time. We find half-lives of 1.10(8) s and 3.8(2) s, and β-delayed proton emission branches of 12(2)% and 25(4)% were deduced for the ground and isomeric states, respectively. With these results, the nuclear data needed to determine an rp-process contribution to the unknown origin of solar ⁹⁶Ru are in place. When the new data are included in astrophysical rp-process calculations, one finds that an rp-process origin of ⁹⁶Ru is unlikely.

Original language	English
Pages (from-to)	141-144
Number of pages	4
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	699
Issue number	3
DOIs	https://doi.org/10.1016/j.physletb.2011.03.043
State	Published - May 9 2011

Keywords

-delayed proton decay
Cd
P-nuclei
Rp-process
Spin-gap isomer
X-ray burst

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10.1016/j.physletb.2011.03.043

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Lorusso, G., Becerril, A., Amthor, A., Baumann, T., Bazin, D., Berryman, J. S., Brown, B. A., Cyburt, R. H., Crawford, H. L., Estrade, A., Gade, A., Ginter, T., Guess, C. J., Hausmann, M., Hitt, G. W., Mantica, P. F., Matos, M., Meharchand, R., Minamisono, K., ... Zegers, R. G. T. (2011). Half-lives of ground and isomeric states in ⁹⁷Cd and the astrophysical origin of ⁹⁶Ru. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 699(3), 141-144. https://doi.org/10.1016/j.physletb.2011.03.043

@article{e16b3f0d4f5e4e7f9b4955a6b2371ab6,

title = "Half-lives of ground and isomeric states in 97Cd and the astrophysical origin of 96Ru",

abstract = "First experimental evidence for a high-spin isomer (25/2+) in 97Cd, a waiting point in the astrophysical rapid proton capture process, is presented. The data were obtained in β-decay studies at NSCL using the new RF Fragment Separator system and detecting β-delayed protons and β-delayed γ rays. Decays from ground and isomeric states were disentangled, and proton emission branches were determined for the first time. We find half-lives of 1.10(8) s and 3.8(2) s, and β-delayed proton emission branches of 12(2)% and 25(4)% were deduced for the ground and isomeric states, respectively. With these results, the nuclear data needed to determine an rp-process contribution to the unknown origin of solar 96Ru are in place. When the new data are included in astrophysical rp-process calculations, one finds that an rp-process origin of 96Ru is unlikely.",

keywords = "-delayed proton decay, Cd, P-nuclei, Rp-process, Spin-gap isomer, X-ray burst",

author = "G. Lorusso and A. Becerril and A. Amthor and T. Baumann and D. Bazin and Berryman, {J. S.} and Brown, {B. A.} and Cyburt, {R. H.} and Crawford, {H. L.} and A. Estrade and A. Gade and T. Ginter and Guess, {C. J.} and M. Hausmann and Hitt, {G. W.} and Mantica, {P. F.} and M. Matos and R. Meharchand and K. Minamisono and F. Montes and G. Perdikakis and J. Pereira and M. Portillo and H. Schatz and K. Smith and J. Stoker and A. Stolz and Zegers, {R. G.T.}",

note = "Funding Information: We thank the NSCL operations department for providing the high intensity 112 Sn primary beam and 97 Cd secondary beam. This work is supported in part by NSF grants PHY02-16783 , PHY-06-06007 , PHY08-22648 , and PHY-0758099 .",

year = "2011",

month = may,

day = "9",

doi = "10.1016/j.physletb.2011.03.043",

language = "English",

volume = "699",

pages = "141--144",

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

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Lorusso, G, Becerril, A, Amthor, A, Baumann, T, Bazin, D, Berryman, JS, Brown, BA, Cyburt, RH, Crawford, HL, Estrade, A, Gade, A, Ginter, T, Guess, CJ, Hausmann, M, Hitt, GW, Mantica, PF, Matos, M, Meharchand, R, Minamisono, K, Montes, F, Perdikakis, G, Pereira, J, Portillo, M, Schatz, H, Smith, K, Stoker, J, Stolz, A & Zegers, RGT 2011, 'Half-lives of ground and isomeric states in ⁹⁷Cd and the astrophysical origin of ⁹⁶Ru', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 699, no. 3, pp. 141-144. https://doi.org/10.1016/j.physletb.2011.03.043

TY - JOUR

T1 - Half-lives of ground and isomeric states in 97Cd and the astrophysical origin of 96Ru

AU - Lorusso, G.

AU - Becerril, A.

AU - Amthor, A.

AU - Baumann, T.

AU - Bazin, D.

AU - Berryman, J. S.

AU - Brown, B. A.

AU - Cyburt, R. H.

AU - Crawford, H. L.

AU - Estrade, A.

AU - Gade, A.

AU - Ginter, T.

AU - Guess, C. J.

AU - Hausmann, M.

AU - Hitt, G. W.

AU - Mantica, P. F.

AU - Matos, M.

AU - Meharchand, R.

AU - Minamisono, K.

AU - Montes, F.

AU - Perdikakis, G.

AU - Pereira, J.

AU - Portillo, M.

AU - Schatz, H.

AU - Smith, K.

AU - Stoker, J.

AU - Stolz, A.

AU - Zegers, R. G.T.

N1 - Funding Information: We thank the NSCL operations department for providing the high intensity 112 Sn primary beam and 97 Cd secondary beam. This work is supported in part by NSF grants PHY02-16783 , PHY-06-06007 , PHY08-22648 , and PHY-0758099 .

PY - 2011/5/9

Y1 - 2011/5/9

N2 - First experimental evidence for a high-spin isomer (25/2+) in 97Cd, a waiting point in the astrophysical rapid proton capture process, is presented. The data were obtained in β-decay studies at NSCL using the new RF Fragment Separator system and detecting β-delayed protons and β-delayed γ rays. Decays from ground and isomeric states were disentangled, and proton emission branches were determined for the first time. We find half-lives of 1.10(8) s and 3.8(2) s, and β-delayed proton emission branches of 12(2)% and 25(4)% were deduced for the ground and isomeric states, respectively. With these results, the nuclear data needed to determine an rp-process contribution to the unknown origin of solar 96Ru are in place. When the new data are included in astrophysical rp-process calculations, one finds that an rp-process origin of 96Ru is unlikely.

AB - First experimental evidence for a high-spin isomer (25/2+) in 97Cd, a waiting point in the astrophysical rapid proton capture process, is presented. The data were obtained in β-decay studies at NSCL using the new RF Fragment Separator system and detecting β-delayed protons and β-delayed γ rays. Decays from ground and isomeric states were disentangled, and proton emission branches were determined for the first time. We find half-lives of 1.10(8) s and 3.8(2) s, and β-delayed proton emission branches of 12(2)% and 25(4)% were deduced for the ground and isomeric states, respectively. With these results, the nuclear data needed to determine an rp-process contribution to the unknown origin of solar 96Ru are in place. When the new data are included in astrophysical rp-process calculations, one finds that an rp-process origin of 96Ru is unlikely.

KW - -delayed proton decay

KW - Cd

KW - P-nuclei

KW - Rp-process

KW - Spin-gap isomer

KW - X-ray burst

UR - http://www.scopus.com/inward/record.url?scp=79954922071&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2011.03.043

DO - 10.1016/j.physletb.2011.03.043

M3 - Article

AN - SCOPUS:79954922071

VL - 699

SP - 141

EP - 144

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

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

SN - 0370-2693

IS - 3

ER -

Half-lives of ground and isomeric states in ⁹⁷Cd and the astrophysical origin of ⁹⁶Ru

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