Systematics of complex fragment emission in niobium-induced reactions

R. J. Charity; M. A. McMahan; G. J. Wozniak; R. J. McDonald; L. G. Moretto; D. G. Sarantites; L. G. Sobotka; G. Guarino; A. Pantaleo; L. Fiore; A. Gobbi; K. D. Hildenbrand

doi:10.1016/0375-9474(88)90542-8

Systematics of complex fragment emission in niobium-induced reactions

R. J. Charity, M. A. McMahan, G. J. Wozniak, R. J. McDonald, L. G. Moretto, D. G. Sarantites, L. G. Sobotka, G. Guarino, A. Pantaleo, L. Fiore, A. Gobbi, K. D. Hildenbrand

Department of Chemistry

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651 Scopus citations

Abstract

Complex fragments of 3<Z{less-than or approximate}35 have been detected in the reverse-kinematics reactions of ⁹³Nb plus ⁹Be, ¹²C and ²⁷Al at bombarding energies of E/A=11.4, 14.7 and 18.0 MeV. Velocity spectra and angular distributions show the presence of projectile and target-like components along with a component isotropic (in the reaction plane). This latter component aappears as a Coulomb ring in the invariant cross section plots indicating the presence of a binary decay which is confirmed by the coincidence data. Statistical model calculations indicate that for the Nb+Be and C reactions, the isotropic component is associated with the binary decay of compound nuclei formed in complete fusion reactions. The charge distributions for these two systems are consistent with the conditional barriers predicted with the rotating finite-range model. For the Nb+Al reactions, there is an additional isotropic component besides compound nucleus decay, which may arise from fast fission.

Original language	English
Pages (from-to)	371-405
Number of pages	35
Journal	Nuclear Physics, Section A
Volume	483
Issue number	2
DOIs	https://doi.org/10.1016/0375-9474(88)90542-8
State	Published - Jun 20 1988

Keywords

NUCLEAR REACTION

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title = "Systematics of complex fragment emission in niobium-induced reactions",

abstract = "Complex fragments of 393Nb plus 9Be, 12C and 27Al at bombarding energies of E/A=11.4, 14.7 and 18.0 MeV. Velocity spectra and angular distributions show the presence of projectile and target-like components along with a component isotropic (in the reaction plane). This latter component aappears as a Coulomb ring in the invariant cross section plots indicating the presence of a binary decay which is confirmed by the coincidence data. Statistical model calculations indicate that for the Nb+Be and C reactions, the isotropic component is associated with the binary decay of compound nuclei formed in complete fusion reactions. The charge distributions for these two systems are consistent with the conditional barriers predicted with the rotating finite-range model. For the Nb+Al reactions, there is an additional isotropic component besides compound nucleus decay, which may arise from fast fission.",

keywords = "NUCLEAR REACTION",

author = "Charity, {R. J.} and McMahan, {M. A.} and Wozniak, {G. J.} and McDonald, {R. J.} and Moretto, {L. G.} and Sarantites, {D. G.} and Sobotka, {L. G.} and G. Guarino and A. Pantaleo and L. Fiore and A. Gobbi and Hildenbrand, {K. D.}",

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doi = "10.1016/0375-9474(88)90542-8",

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AU - Charity, R. J.

AU - McMahan, M. A.

AU - Wozniak, G. J.

AU - McDonald, R. J.

AU - Moretto, L. G.

AU - Sarantites, D. G.

AU - Sobotka, L. G.

AU - Guarino, G.

AU - Pantaleo, A.

AU - Fiore, L.

AU - Gobbi, A.

AU - Hildenbrand, K. D.

PY - 1988/6/20

Y1 - 1988/6/20

N2 - Complex fragments of 393Nb plus 9Be, 12C and 27Al at bombarding energies of E/A=11.4, 14.7 and 18.0 MeV. Velocity spectra and angular distributions show the presence of projectile and target-like components along with a component isotropic (in the reaction plane). This latter component aappears as a Coulomb ring in the invariant cross section plots indicating the presence of a binary decay which is confirmed by the coincidence data. Statistical model calculations indicate that for the Nb+Be and C reactions, the isotropic component is associated with the binary decay of compound nuclei formed in complete fusion reactions. The charge distributions for these two systems are consistent with the conditional barriers predicted with the rotating finite-range model. For the Nb+Al reactions, there is an additional isotropic component besides compound nucleus decay, which may arise from fast fission.

AB - Complex fragments of 393Nb plus 9Be, 12C and 27Al at bombarding energies of E/A=11.4, 14.7 and 18.0 MeV. Velocity spectra and angular distributions show the presence of projectile and target-like components along with a component isotropic (in the reaction plane). This latter component aappears as a Coulomb ring in the invariant cross section plots indicating the presence of a binary decay which is confirmed by the coincidence data. Statistical model calculations indicate that for the Nb+Be and C reactions, the isotropic component is associated with the binary decay of compound nuclei formed in complete fusion reactions. The charge distributions for these two systems are consistent with the conditional barriers predicted with the rotating finite-range model. For the Nb+Al reactions, there is an additional isotropic component besides compound nucleus decay, which may arise from fast fission.

KW - NUCLEAR REACTION

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VL - 483

SP - 371

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JO - Nuclear Physics, Section A

JF - Nuclear Physics, Section A

IS - 2

ER -

Systematics of complex fragment emission in niobium-induced reactions

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Keywords

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