Study of the Level Structure of $N = 82$ Nuclei via Proton-Transfer Reactions

1 March 1971

journal article
research article
Published by American Physical Society (APS) in Physical Review C

Vol. 3 (3), 1199-1220
https://doi.org/10.1103/physrevc.3.1199

Abstract

Measurements of the angular distributions of the (

{}^{3}{He}, d

) and (

d, {}^{3}{He}

) reactions on the stable, even-mass

N = 82

isotones are presented and discussed. In each of the residual nuclei formed in these reactions,

{}^{135}I

{}^{137}{Cs}

{}^{139}{La}

{}^{141}\Pr

{}^{143}{Pm}

, and

{}^{145}{Eu}

, the lowest two levels are populated with significant strength, one by

l_{p} = 4

transfer and one by

l_{p} = 2

transfer. Analysis indicates that these states result from coupling a

1 g_{\frac{7}{2}}

2 d_{\frac{5}{2}}

proton (or proton hole) to the respective

J^{π} = 0^{+}

target ground states. The relative energies of these states change as a function of mass, the

{\frac{5}{2}}^{+}

state lying 590 keV above the

{\frac{7}{2}}^{+}

state in

{}^{135}I

, and 330 keV below the

{\frac{7}{2}}^{+}

state in

{}^{145}{Eu}

. Spectroscopic factors extracted from the data with distorted-wave Born-approximation analysis indicate that the active particles in the target ground states predominantly occupy the

1 g_{\frac{7}{2}}

and

2 d_{\frac{5}{2}}

orbits, with the ratio of

1 g_{\frac{7}{2}}

protons to

2 d_{\frac{5}{2}}

protons varying from 3.5/0.5 for

Keywords

This publication has 24 references indexed in Scilit:

Level Structure in ${}^{145}{Eu}$
Physical Review C, 1970
Structure of 141Pr
Physics Letters B, 1969
Shell Model for $N = 82$ Nuclei
Physical Review Letters, 1969
Levels in 137Cs, 139La, 143Pm and 145Eu observed with proton transfer reaction
Physics Letters B, 1968
( $d$ , ${}^{3}{He}$ ) Reactions on the Even Zirconium Isotopes
Physical Review B, 1968
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Physical Review B, 1967
Normalization of and Finite-Range Effects in ( ${}^{3}{He}$ , $d$ ) and ( $t, d$ ) Reactions
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Study of the reaction 208Pb(d, p)209Pb at energies below the Coulomb barrier
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Cited by 116 articles

Study of the Level Structure ofN=82Nuclei via Proton-Transfer Reactions

Abstract

Keywords

Study of the Level Structure of $N = 82$ Nuclei via Proton-Transfer Reactions