Evaluation Home Page |
| Information on mass chains and nuclides |
|
 |
13B (1959AJ76)
(Not illustrated)
GENERAL: See also Table 13.1 [Table of Energy Levels] (in PDF or PS).
Mass of 13B: The mass excess of 13B is 20.40 ± 0.05 MeV from the Q of the reaction 7Li(7Li, p)13B (1957NO14), and Wapstra's masses (1955WA1A) for 7Li and 1H. 13B is then stable by 4.88 MeV to decay into 12B + n, by 11.00 MeV to decay into 10Be + t and by 11.3 MeV to decay into 9Li + α.
| 1. 13B(β-)13C | Qm = 13.44 |
The half-life of 13B is (35 ± 15) × 10-3 sec (1956NO1A). Attempts to observe delayed neutrons from the decay of neutron-unstable states of 13C have been unsuccessful (1953HU1C, 1956NO1A). It is pointed out by (1957NO14) that transitions to such states are unlikely if 13B has the expected J = 3/2-. See also (1948SN1A, 1952SH44).
| 2. 7Li(7Li, p)13B | Qm = 5.97 |
| Q0 = 5.97 ± 0.05 (1957NO14). |
This reaction has been observed for E(7Li) = 1.4 to 2.0 MeV (1956AL1F, 1957NO14, 1958LI42). At E(7Li) = 2 MeV, no proton groups have been observed corresponding to excited states of 13B below Ex = 2.9 MeV (1958LI42). See also 14C.
| 3. 11B(t, p)13B | Qm = 0.24 |
Not reported.