TUNL Nuclear Data
Evaluation Home Page

Information on mass
chains and nuclides
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
 
Group Info
Publications
HTML
General Tables
Level Diagrams
Tables of EL's
NSR Key# Retrieval
ENSDF
Excitation Functions
Thermal N Capt.
G.S. Decays
Half-Lives Table
TUNL Dissertations
NuDat at BNL
Useful Links
Citation Examples
 
Home
Sitemap
Directory
Email Us


WWW TUNL

USNDP

7B (1974AJ01)


(See the Isobar Diagram for 7B)

1. 10B(3He, 6He)7B Qm = -18.55

A 6He group corresponding to the unbound ground state of 7B has been identified at E(3He) = 50 MeV: M - A (7B) = 27.94 ± 0.10, Γ = 1.4 ± 0.2 MeV. The isobaric quartet mass law would predict M - A = 27.76 ± 0.17 MeV. 7B is unbound with respect to 6Be + p (Q = 2.27), 5Li + 2p (Q = 1.68), 4He + 3p (Q = 3.65). The expected single-particle width is Γ = 0.64 MeV: it is suggested that the two-proton and three-proton decays make an appreciable contribution to the width (1967MC14). See also (1960GO1B, 1968CE1A, 1968ST1J, 1969GA1P, 1972CA37, 1972CE1A).