alpha breakup of Li-6 and Li-7 near the Coulomb barrier

G R  Kelly; N J  Davis; R P  Ward; B R  Fulton; G  Tungate; N  Keeley; K  Rusek; E E  Bartosz; P D  Gathers; D D  Caussyn; T L  Drummer; K W  Kemper

alpha breakup of Li-6 and Li-7 near the Coulomb barrier

G R Kelly, N J Davis, R P Ward, B R Fulton, G Tungate, N Keeley, K Rusek, E E Bartosz, P D Gathers, D D Caussyn, T L Drummer, K W Kemper

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

Abstract

Angular distributions of the alpha -particle production differential cross section from the breakup of Li-6 and Li-7 projectiles incident on a Pb-208 target have been measured at seven projectile energies between 29 and 52 MeV. The alpha -breakup cross section of Li-6 was found to be systematically greater than that of Li-7 across the entire energy range. These data have been compared with previously reported results and with the predictions of continuum-discretized coupled channels (CDCC) calculations including resonant and nonresonant projectile breakup. The present data compare well with previous measurements, while the CDCC calculations provide a reasonable prediction of the relative alpha -breakup cross sections but underpredict their absolute values. The calculations confirm that a major factor in the enhancement of the Li-6 to Li-7 alpha -breakup cross section is the difference between the alpha -breakup thresholds of the two isotopes. These results have implications for structural studies of light exotic nuclei based on elastic scattering.

Original language	English
Article number	024601
Pages (from-to)	-
Number of pages	7
Journal	Physical Review C
Volume	6302
Issue number	2
Publication status	Published - Feb 2001

Cite this

@article{cfd834fd4f5b444ebf0c5eb472abfe3b,

title = "alpha breakup of Li-6 and Li-7 near the Coulomb barrier",

abstract = "Angular distributions of the alpha -particle production differential cross section from the breakup of Li-6 and Li-7 projectiles incident on a Pb-208 target have been measured at seven projectile energies between 29 and 52 MeV. The alpha -breakup cross section of Li-6 was found to be systematically greater than that of Li-7 across the entire energy range. These data have been compared with previously reported results and with the predictions of continuum-discretized coupled channels (CDCC) calculations including resonant and nonresonant projectile breakup. The present data compare well with previous measurements, while the CDCC calculations provide a reasonable prediction of the relative alpha -breakup cross sections but underpredict their absolute values. The calculations confirm that a major factor in the enhancement of the Li-6 to Li-7 alpha -breakup cross section is the difference between the alpha -breakup thresholds of the two isotopes. These results have implications for structural studies of light exotic nuclei based on elastic scattering.",

author = "Kelly, {G R} and Davis, {N J} and Ward, {R P} and Fulton, {B R} and G Tungate and N Keeley and K Rusek and Bartosz, {E E} and Gathers, {P D} and Caussyn, {D D} and Drummer, {T L} and Kemper, {K W}",

year = "2001",

month = feb,

language = "English",

volume = "6302",

pages = "--",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "2",

}

TY - JOUR

T1 - alpha breakup of Li-6 and Li-7 near the Coulomb barrier

AU - Kelly, G R

AU - Davis, N J

AU - Ward, R P

AU - Fulton, B R

AU - Tungate, G

AU - Keeley, N

AU - Rusek, K

AU - Bartosz, E E

AU - Gathers, P D

AU - Caussyn, D D

AU - Drummer, T L

AU - Kemper, K W

PY - 2001/2

Y1 - 2001/2

N2 - Angular distributions of the alpha -particle production differential cross section from the breakup of Li-6 and Li-7 projectiles incident on a Pb-208 target have been measured at seven projectile energies between 29 and 52 MeV. The alpha -breakup cross section of Li-6 was found to be systematically greater than that of Li-7 across the entire energy range. These data have been compared with previously reported results and with the predictions of continuum-discretized coupled channels (CDCC) calculations including resonant and nonresonant projectile breakup. The present data compare well with previous measurements, while the CDCC calculations provide a reasonable prediction of the relative alpha -breakup cross sections but underpredict their absolute values. The calculations confirm that a major factor in the enhancement of the Li-6 to Li-7 alpha -breakup cross section is the difference between the alpha -breakup thresholds of the two isotopes. These results have implications for structural studies of light exotic nuclei based on elastic scattering.

AB - Angular distributions of the alpha -particle production differential cross section from the breakup of Li-6 and Li-7 projectiles incident on a Pb-208 target have been measured at seven projectile energies between 29 and 52 MeV. The alpha -breakup cross section of Li-6 was found to be systematically greater than that of Li-7 across the entire energy range. These data have been compared with previously reported results and with the predictions of continuum-discretized coupled channels (CDCC) calculations including resonant and nonresonant projectile breakup. The present data compare well with previous measurements, while the CDCC calculations provide a reasonable prediction of the relative alpha -breakup cross sections but underpredict their absolute values. The calculations confirm that a major factor in the enhancement of the Li-6 to Li-7 alpha -breakup cross section is the difference between the alpha -breakup thresholds of the two isotopes. These results have implications for structural studies of light exotic nuclei based on elastic scattering.

M3 - Article

SN - 0556-2813

VL - 6302

SP - -

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 024601

ER -