Examining the role of transfer coupling in sub-barrier fusion of Ti 46,50 + Sn 124

J. F. Liang; J. M. Allmond; C. J. Gross; P. E. Mueller; D. Shapira; R. L. Varner; M. Dasgupta; D. J. Hinde; C. Simenel; E. Williams; K. Vo-Phuoc; M. L. Brown; I. P. Carter; M. Evers; D. H. Luong; T. Ebadi; A. Wakhle

doi:10.1103/PhysRevC.94.024616

Examining the role of transfer coupling in sub-barrier fusion of Ti 46,50 + Sn 124

J. F. Liang, J. M. Allmond, C. J. Gross, P. E. Mueller, D. Shapira, R. L. Varner, M. Dasgupta, D. J. Hinde, C. Simenel, E. Williams, K. Vo-Phuoc, M. L. Brown, I. P. Carter, M. Evers, D. H. Luong, T. Ebadi, A. Wakhle

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Abstract

Background: The presence of neutron transfer channels with positive Q values can enhance sub-barrier fusion cross sections. Recent measurements of the fusion excitation functions for Ni58+Sn132,124 found that the fusion enhancement due to the influence of neutron transfer is smaller than that in Ca40+Sn132,124 although the Q values for multineutron transfer are comparable. Purpose: To investigate the differences observed between the fusion of Sn + Ni and Sn + Ca. Methods: Fusion excitation functions for Ti46,50+Sn124 have been measured at energies near the Coulomb barrier. Results: A comparison of the barrier distributions for Ti46+Sn124 and Ca40+Sn124 shows that the Ca40+Sn124 system has a barrier strength resulting from the coupling to the very collective octupole state in Ca40 at an energy significantly lower than the uncoupled barrier. Conclusions: The large sub-barrier fusion enhancement in Ca40 induced reactions is attributed to both couplings to neutron transfer and inelastic excitation, with the octupole vibration of Ca40 playing a major role.

Original language	English
Article number	024616
Journal	Physical Review C
Volume	94
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.94.024616
Publication status	Published - 24 Aug 2016

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Liang, J. F., Allmond, J. M., Gross, C. J., Mueller, P. E., Shapira, D., Varner, R. L., Dasgupta, M., Hinde, D. J., Simenel, C., Williams, E., Vo-Phuoc, K., Brown, M. L., Carter, I. P., Evers, M., Luong, D. H., Ebadi, T., & Wakhle, A. (2016). Examining the role of transfer coupling in sub-barrier fusion of Ti 46,50 + Sn 124. Physical Review C, 94(2), Article 024616. https://doi.org/10.1103/PhysRevC.94.024616

@article{7bcd62e56b7247518e894fb4217dc51e,

title = "Examining the role of transfer coupling in sub-barrier fusion of Ti 46,50 + Sn 124",

abstract = "Background: The presence of neutron transfer channels with positive Q values can enhance sub-barrier fusion cross sections. Recent measurements of the fusion excitation functions for Ni58+Sn132,124 found that the fusion enhancement due to the influence of neutron transfer is smaller than that in Ca40+Sn132,124 although the Q values for multineutron transfer are comparable. Purpose: To investigate the differences observed between the fusion of Sn + Ni and Sn + Ca. Methods: Fusion excitation functions for Ti46,50+Sn124 have been measured at energies near the Coulomb barrier. Results: A comparison of the barrier distributions for Ti46+Sn124 and Ca40+Sn124 shows that the Ca40+Sn124 system has a barrier strength resulting from the coupling to the very collective octupole state in Ca40 at an energy significantly lower than the uncoupled barrier. Conclusions: The large sub-barrier fusion enhancement in Ca40 induced reactions is attributed to both couplings to neutron transfer and inelastic excitation, with the octupole vibration of Ca40 playing a major role.",

author = "Liang, {J. F.} and Allmond, {J. M.} and Gross, {C. J.} and Mueller, {P. E.} and D. Shapira and Varner, {R. L.} and M. Dasgupta and Hinde, {D. J.} and C. Simenel and E. Williams and K. Vo-Phuoc and Brown, {M. L.} and Carter, {I. P.} and M. Evers and Luong, {D. H.} and T. Ebadi and A. Wakhle",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = aug,

day = "24",

doi = "10.1103/PhysRevC.94.024616",

language = "English",

volume = "94",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "2",

}

Liang, JF, Allmond, JM, Gross, CJ, Mueller, PE, Shapira, D, Varner, RL, Dasgupta, M , Hinde, DJ , Simenel, C , Williams, E, Vo-Phuoc, K, Brown, ML, Carter, IP, Evers, M, Luong, DH, Ebadi, T & Wakhle, A 2016, 'Examining the role of transfer coupling in sub-barrier fusion of Ti 46,50 + Sn 124', Physical Review C, vol. 94, no. 2, 024616. https://doi.org/10.1103/PhysRevC.94.024616

TY - JOUR

T1 - Examining the role of transfer coupling in sub-barrier fusion of Ti 46,50 + Sn 124

AU - Liang, J. F.

AU - Allmond, J. M.

AU - Gross, C. J.

AU - Mueller, P. E.

AU - Shapira, D.

AU - Varner, R. L.

AU - Dasgupta, M.

AU - Hinde, D. J.

AU - Simenel, C.

AU - Williams, E.

AU - Vo-Phuoc, K.

AU - Brown, M. L.

AU - Carter, I. P.

AU - Evers, M.

AU - Luong, D. H.

AU - Ebadi, T.

AU - Wakhle, A.

PY - 2016/8/24

Y1 - 2016/8/24

N2 - Background: The presence of neutron transfer channels with positive Q values can enhance sub-barrier fusion cross sections. Recent measurements of the fusion excitation functions for Ni58+Sn132,124 found that the fusion enhancement due to the influence of neutron transfer is smaller than that in Ca40+Sn132,124 although the Q values for multineutron transfer are comparable. Purpose: To investigate the differences observed between the fusion of Sn + Ni and Sn + Ca. Methods: Fusion excitation functions for Ti46,50+Sn124 have been measured at energies near the Coulomb barrier. Results: A comparison of the barrier distributions for Ti46+Sn124 and Ca40+Sn124 shows that the Ca40+Sn124 system has a barrier strength resulting from the coupling to the very collective octupole state in Ca40 at an energy significantly lower than the uncoupled barrier. Conclusions: The large sub-barrier fusion enhancement in Ca40 induced reactions is attributed to both couplings to neutron transfer and inelastic excitation, with the octupole vibration of Ca40 playing a major role.

AB - Background: The presence of neutron transfer channels with positive Q values can enhance sub-barrier fusion cross sections. Recent measurements of the fusion excitation functions for Ni58+Sn132,124 found that the fusion enhancement due to the influence of neutron transfer is smaller than that in Ca40+Sn132,124 although the Q values for multineutron transfer are comparable. Purpose: To investigate the differences observed between the fusion of Sn + Ni and Sn + Ca. Methods: Fusion excitation functions for Ti46,50+Sn124 have been measured at energies near the Coulomb barrier. Results: A comparison of the barrier distributions for Ti46+Sn124 and Ca40+Sn124 shows that the Ca40+Sn124 system has a barrier strength resulting from the coupling to the very collective octupole state in Ca40 at an energy significantly lower than the uncoupled barrier. Conclusions: The large sub-barrier fusion enhancement in Ca40 induced reactions is attributed to both couplings to neutron transfer and inelastic excitation, with the octupole vibration of Ca40 playing a major role.

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U2 - 10.1103/PhysRevC.94.024616

DO - 10.1103/PhysRevC.94.024616

M3 - Article

SN - 2469-9985

VL - 94

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 024616

ER -

Examining the role of transfer coupling in sub-barrier fusion of Ti 46,50 + Sn 124

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