Large β-delayed neutron emission probabilities in the Ni78 region

J. A. Winger; S. V. Ilyushkin; K. P. Rykaczewski; C. J. Gross; J. C. Batchelder; C. Goodin; R. Grzywacz; J. H. Hamilton; A. Korgul; W. Królas; S. N. Liddick; C. Mazzocchi; S. Padgett; A. Piechaczek; M. M. Rajabali; D. Shapira; E. F. Zganjar; I. N. Borzov

doi:10.1103/PhysRevLett.102.142502

Large β-delayed neutron emission probabilities in the Ni78 region

J. A. Winger, S. V. Ilyushkin, K. P. Rykaczewski, C. J. Gross, J. C. Batchelder, C. Goodin, R. Grzywacz, J. H. Hamilton, A. Korgul, W. Królas, S. N. Liddick, C. Mazzocchi, S. Padgett, A. Piechaczek, M. M. Rajabali, D. Shapira, E. F. Zganjar, I. N. Borzov

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Abstract

The β-delayed neutron branching ratios (Pβn) for nuclei near doubly magic Ni78 have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital β-γ spectroscopy of U238 fission products. The Pβn values for the very neutron-rich isotopes Cu76-78 and Ga83 were found to be much higher than previously reported and predicted. Revised calculations of the βn process, accounting for new mass measurements and an inversion of the π2p3/2 and π1f5/2 orbitals, are in better agreement with these new experimental results.

Original language	English
Article number	142502
Journal	Physical Review Letters
Volume	102
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.102.142502
State	Published - Apr 6 2009

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Winger, J. A., Ilyushkin, S. V., Rykaczewski, K. P., Gross, C. J., Batchelder, J. C., Goodin, C., Grzywacz, R., Hamilton, J. H., Korgul, A., Królas, W., Liddick, S. N., Mazzocchi, C., Padgett, S., Piechaczek, A., Rajabali, M. M., Shapira, D., Zganjar, E. F., & Borzov, I. N. (2009). Large β-delayed neutron emission probabilities in the Ni78 region. Physical Review Letters, 102(14), Article 142502. https://doi.org/10.1103/PhysRevLett.102.142502

@article{e73bbb5591ad450cb28d8905d2b0cf3e,

title = "Large β-delayed neutron emission probabilities in the Ni78 region",

abstract = "The β-delayed neutron branching ratios (Pβn) for nuclei near doubly magic Ni78 have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital β-γ spectroscopy of U238 fission products. The Pβn values for the very neutron-rich isotopes Cu76-78 and Ga83 were found to be much higher than previously reported and predicted. Revised calculations of the βn process, accounting for new mass measurements and an inversion of the π2p3/2 and π1f5/2 orbitals, are in better agreement with these new experimental results.",

author = "Winger, {J. A.} and Ilyushkin, {S. V.} and Rykaczewski, {K. P.} and Gross, {C. J.} and Batchelder, {J. C.} and C. Goodin and R. Grzywacz and Hamilton, {J. H.} and A. Korgul and W. Kr{\'o}las and Liddick, {S. N.} and C. Mazzocchi and S. Padgett and A. Piechaczek and Rajabali, {M. M.} and D. Shapira and Zganjar, {E. F.} and Borzov, {I. N.}",

year = "2009",

month = apr,

day = "6",

doi = "10.1103/PhysRevLett.102.142502",

language = "English",

volume = "102",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "14",

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Winger, JA, Ilyushkin, SV, Rykaczewski, KP, Gross, CJ, Batchelder, JC, Goodin, C, Grzywacz, R, Hamilton, JH, Korgul, A, Królas, W, Liddick, SN, Mazzocchi, C, Padgett, S, Piechaczek, A, Rajabali, MM, Shapira, D, Zganjar, EF & Borzov, IN 2009, 'Large β-delayed neutron emission probabilities in the Ni78 region', Physical Review Letters, vol. 102, no. 14, 142502. https://doi.org/10.1103/PhysRevLett.102.142502

TY - JOUR

T1 - Large β-delayed neutron emission probabilities in the Ni78 region

AU - Winger, J. A.

AU - Ilyushkin, S. V.

AU - Rykaczewski, K. P.

AU - Gross, C. J.

AU - Batchelder, J. C.

AU - Goodin, C.

AU - Grzywacz, R.

AU - Hamilton, J. H.

AU - Korgul, A.

AU - Królas, W.

AU - Liddick, S. N.

AU - Mazzocchi, C.

AU - Padgett, S.

AU - Piechaczek, A.

AU - Rajabali, M. M.

AU - Shapira, D.

AU - Zganjar, E. F.

AU - Borzov, I. N.

PY - 2009/4/6

Y1 - 2009/4/6

N2 - The β-delayed neutron branching ratios (Pβn) for nuclei near doubly magic Ni78 have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital β-γ spectroscopy of U238 fission products. The Pβn values for the very neutron-rich isotopes Cu76-78 and Ga83 were found to be much higher than previously reported and predicted. Revised calculations of the βn process, accounting for new mass measurements and an inversion of the π2p3/2 and π1f5/2 orbitals, are in better agreement with these new experimental results.

AB - The β-delayed neutron branching ratios (Pβn) for nuclei near doubly magic Ni78 have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital β-γ spectroscopy of U238 fission products. The Pβn values for the very neutron-rich isotopes Cu76-78 and Ga83 were found to be much higher than previously reported and predicted. Revised calculations of the βn process, accounting for new mass measurements and an inversion of the π2p3/2 and π1f5/2 orbitals, are in better agreement with these new experimental results.

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U2 - 10.1103/PhysRevLett.102.142502

DO - 10.1103/PhysRevLett.102.142502

M3 - Article

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SN - 0031-9007

VL - 102

JO - Physical Review Letters

JF - Physical Review Letters

IS - 14

M1 - 142502

ER -

Large β-delayed neutron emission probabilities in the Ni78 region

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