Internal pair conversion in heavy nuclei

I. Ahmad; S. M. Austin; B. B. Back; R. R. Betts; F. P. Calaprice; K. C. Chan; A. A. Chishti; C. Conner; R. W. Dunford; J. D. Fox; S. J. Freedman; M. Freer; J. S. Greenberg; S. B. Gazes; A. L. Hallin; T. Happ; D. Henderson; N. I. Kaloskamis; E. Kashy; W. Kutschera; J. Last; C. J. Lister; M. Liu; M. R. Maier; D. J. Mercer; D. Mikolas; P. A.A. Perera; M. D. Rhein; D. E. Roa; J. P. Schiffer; T. A. Trainor; P. Wilt; J. S. Winfield; M. Wolanski; F. L.H. Wolfs; A. H. Wuosmaa; G. Xu; A. Young; J. E. Yurkon

doi:10.1103/PhysRevC.55.R2755

Internal pair conversion in heavy nuclei

I. Ahmad
, S. M. Austin
, B. B. Back
, R. R. Betts
, F. P. Calaprice
, K. C. Chan
, A. A. Chishti
, C. Conner
, R. W. Dunford
, J. D. Fox
, S. J. Freedman
, M. Freer
, J. S. Greenberg
, S. B. Gazes
, A. L. Hallin
, T. Happ
, D. Henderson
, N. I. Kaloskamis
, E. Kashy
, W. Kutschera

J. Last, C. J. Lister, M. Liu, M. R. Maier, D. J. Mercer, D. Mikolas, P. A.A. Perera, M. D. Rhein, D. E. Roa, J. P. Schiffer, T. A. Trainor, P. Wilt, J. S. Winfield, M. Wolanski, F. L.H. Wolfs, A. H. Wuosmaa, G. Xu, A. Young, J. E. Yurkon

Physics

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

7 Scopus citations

Abstract

Positrons and electrons from the internal pair conversion (IPC) decay of states populated in near-barrier collisions of very heavy ions have been studied using the APEX spectrometer. Using inelastic [Formula Presented] scattering at 5.90 MeV/nucleon, the gamma and IPC branches of the well-known [Formula Presented] decay of the first [Formula Presented] state were kinematically reconstructed and the IPC-to-gamma branching ratio was determined to be [Formula Presented]. We have also performed experiments with actinide beams or targets; [Formula Presented], [Formula Presented], [Formula Presented], and [Formula Presented], which resulted in the observation of new gamma-ray transitions from high-lying states in [Formula Presented] and [Formula Presented]. None of these were populated with sufficient strength such that IPC could produce statistically significantly peaks in positron-electron sum energy spectra.

Original language	English (US)
Pages (from-to)	R2755-R2759
Journal	Physical Review C - Nuclear Physics
Volume	55
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.55.R2755
State	Published - 1997

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevC.55.R2755

Cite this

Ahmad, I., Austin, S. M., Back, B. B., Betts, R. R., Calaprice, F. P., Chan, K. C., Chishti, A. A., Conner, C., Dunford, R. W., Fox, J. D., Freedman, S. J., Freer, M., Greenberg, J. S., Gazes, S. B., Hallin, A. L., Happ, T., Henderson, D., Kaloskamis, N. I., Kashy, E., ... Yurkon, J. E. (1997). Internal pair conversion in heavy nuclei. Physical Review C - Nuclear Physics, 55(6), R2755-R2759. https://doi.org/10.1103/PhysRevC.55.R2755

@article{c3d6494dc8f24cd78418c8eb6d66b7d7,

title = "Internal pair conversion in heavy nuclei",

abstract = "Positrons and electrons from the internal pair conversion (IPC) decay of states populated in near-barrier collisions of very heavy ions have been studied using the APEX spectrometer. Using inelastic [Formula Presented] scattering at 5.90 MeV/nucleon, the gamma and IPC branches of the well-known [Formula Presented] decay of the first [Formula Presented] state were kinematically reconstructed and the IPC-to-gamma branching ratio was determined to be [Formula Presented]. We have also performed experiments with actinide beams or targets; [Formula Presented], [Formula Presented], [Formula Presented], and [Formula Presented], which resulted in the observation of new gamma-ray transitions from high-lying states in [Formula Presented] and [Formula Presented]. None of these were populated with sufficient strength such that IPC could produce statistically significantly peaks in positron-electron sum energy spectra.",

author = "I. Ahmad and Austin, \{S. M.\} and Back, \{B. B.\} and Betts, \{R. R.\} and Calaprice, \{F. P.\} and Chan, \{K. C.\} and Chishti, \{A. A.\} and C. Conner and Dunford, \{R. W.\} and Fox, \{J. D.\} and Freedman, \{S. J.\} and M. Freer and Greenberg, \{J. S.\} and Gazes, \{S. B.\} and Hallin, \{A. L.\} and T. Happ and D. Henderson and Kaloskamis, \{N. I.\} and E. Kashy and W. Kutschera and J. Last and Lister, \{C. J.\} and M. Liu and Maier, \{M. R.\} and Mercer, \{D. J.\} and D. Mikolas and Perera, \{P. A.A.\} and Rhein, \{M. D.\} and Roa, \{D. E.\} and Schiffer, \{J. P.\} and Trainor, \{T. A.\} and P. Wilt and Winfield, \{J. S.\} and M. Wolanski and Wolfs, \{F. L.H.\} and Wuosmaa, \{A. H.\} and G. Xu and A. Young and Yurkon, \{J. E.\}",

year = "1997",

doi = "10.1103/PhysRevC.55.R2755",

language = "English (US)",

volume = "55",

pages = "R2755--R2759",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "6",

}

Ahmad, I, Austin, SM, Back, BB, Betts, RR, Calaprice, FP, Chan, KC, Chishti, AA, Conner, C, Dunford, RW, Fox, JD, Freedman, SJ, Freer, M, Greenberg, JS, Gazes, SB, Hallin, AL, Happ, T, Henderson, D, Kaloskamis, NI, Kashy, E, Kutschera, W, Last, J, Lister, CJ, Liu, M, Maier, MR, Mercer, DJ, Mikolas, D, Perera, PAA, Rhein, MD, Roa, DE, Schiffer, JP, Trainor, TA, Wilt, P, Winfield, JS, Wolanski, M, Wolfs, FLH, Wuosmaa, AH, Xu, G, Young, A & Yurkon, JE 1997, 'Internal pair conversion in heavy nuclei', Physical Review C - Nuclear Physics, vol. 55, no. 6, pp. R2755-R2759. https://doi.org/10.1103/PhysRevC.55.R2755

TY - JOUR

T1 - Internal pair conversion in heavy nuclei

AU - Ahmad, I.

AU - Austin, S. M.

AU - Back, B. B.

AU - Betts, R. R.

AU - Calaprice, F. P.

AU - Chan, K. C.

AU - Chishti, A. A.

AU - Conner, C.

AU - Dunford, R. W.

AU - Fox, J. D.

AU - Freedman, S. J.

AU - Freer, M.

AU - Greenberg, J. S.

AU - Gazes, S. B.

AU - Hallin, A. L.

AU - Happ, T.

AU - Henderson, D.

AU - Kaloskamis, N. I.

AU - Kashy, E.

AU - Kutschera, W.

AU - Last, J.

AU - Lister, C. J.

AU - Liu, M.

AU - Maier, M. R.

AU - Mercer, D. J.

AU - Mikolas, D.

AU - Perera, P. A.A.

AU - Rhein, M. D.

AU - Roa, D. E.

AU - Schiffer, J. P.

AU - Trainor, T. A.

AU - Wilt, P.

AU - Winfield, J. S.

AU - Wolanski, M.

AU - Wolfs, F. L.H.

AU - Wuosmaa, A. H.

AU - Xu, G.

AU - Young, A.

AU - Yurkon, J. E.

PY - 1997

Y1 - 1997

N2 - Positrons and electrons from the internal pair conversion (IPC) decay of states populated in near-barrier collisions of very heavy ions have been studied using the APEX spectrometer. Using inelastic [Formula Presented] scattering at 5.90 MeV/nucleon, the gamma and IPC branches of the well-known [Formula Presented] decay of the first [Formula Presented] state were kinematically reconstructed and the IPC-to-gamma branching ratio was determined to be [Formula Presented]. We have also performed experiments with actinide beams or targets; [Formula Presented], [Formula Presented], [Formula Presented], and [Formula Presented], which resulted in the observation of new gamma-ray transitions from high-lying states in [Formula Presented] and [Formula Presented]. None of these were populated with sufficient strength such that IPC could produce statistically significantly peaks in positron-electron sum energy spectra.

AB - Positrons and electrons from the internal pair conversion (IPC) decay of states populated in near-barrier collisions of very heavy ions have been studied using the APEX spectrometer. Using inelastic [Formula Presented] scattering at 5.90 MeV/nucleon, the gamma and IPC branches of the well-known [Formula Presented] decay of the first [Formula Presented] state were kinematically reconstructed and the IPC-to-gamma branching ratio was determined to be [Formula Presented]. We have also performed experiments with actinide beams or targets; [Formula Presented], [Formula Presented], [Formula Presented], and [Formula Presented], which resulted in the observation of new gamma-ray transitions from high-lying states in [Formula Presented] and [Formula Presented]. None of these were populated with sufficient strength such that IPC could produce statistically significantly peaks in positron-electron sum energy spectra.

UR - https://www.scopus.com/pages/publications/0031500836

UR - https://www.scopus.com/pages/publications/0031500836#tab=citedBy

U2 - 10.1103/PhysRevC.55.R2755

DO - 10.1103/PhysRevC.55.R2755

M3 - Article

AN - SCOPUS:0031500836

SN - 0556-2813

VL - 55

SP - R2755-R2759

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 6

ER -

Internal pair conversion in heavy nuclei

Abstract

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