Low-energy measurement of the 7Be(p,gamma)8B cross section.
We have measured the cross section of the 7Be(p,gamma)8B reaction for E(c.m.) = 185.8, 134.7, and 111.7 keV using a radioactive 7Be target (132 mCi). Single and coincidence spectra of beta+ and alpha particles from 8B and 8Be* decay, respectively, were measured using a large acceptance spectrometer. The zero energy S factor inferred from these data is 18.5+/-2.4 eV b and a weighted mean value of 18.8+/-1.7 eV b (theoretical uncertainty included) is deduced when combining this value with our previous results at higher energies.
Hammache
F
F
CSNSM, IN2P3-CNRS, F-91405 Orsay et Université de Paris-Sud, France.
Bogaert
G
G
Aguer
P
P
Angulo
C
C
Barhoumi
S
S
Brillard
L
L
Chemin
J F
JF
Claverie
G
G
Coc
A
A
Hussonnois
M
M
Jacotin
M
M
Kiener
J
J
Lefebvre
A
A
Le Naour
C
C
Ouichaoui
S
S
Scheurer
J N
JN
Tatischeff
V
V
Thibaud
J P
JP
Virassamynaïken
E
E