ADOPTED LEVELS for 19B
Authors: G.C. Sheu, J.H. Kelley | Citation: ENSDF | Cutoff date: 25-Oct-2018
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=2.736×104 keV 53 | S(n)= 0.9×102 keV 56 | ||||
| Reference: 2017WA10 |
| References: | |||
| A | 9Be(40Ar,19B) | B | 9Be(56Fe,19B) |
| C | C(19B,X) | D | 181Ta(36S,19B) |
| E | 181Ta(40Ar,19B) | F | TA(48Ca,19B) |
| G | U(p,19B) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0 | ABCDEF | 3/2- | 2.92 ms 13 % β- = 100 % β-n = 71.8 +83-91 % β-2n = 16.0 +56-48 % B-3N < 9.1 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 3/2- | 2.92 ms 13 % β- = 100 % β-n = 71.8 +83-91 % β-2n = 16.0 +56-48 % B-3N < 9.1 | %β-n, %β-2n and %β-3n: From (2003Yo02); see also Pn=1×P1n+2×P2n+...=(125 32)%>100% (1998Yo06), which implies the existence of significant multineutron emissions in the β-delayed neutron decay. E(level): %β-n, %β-2n and %β-3n: From (2003Yo02); see also Pn=1×P1n+2×P2n+...=(125 32)%>100% (1998Yo06), which implies the existence of significant multineutron emissions in the β-delayed neutron decay. |
The 19B nucleus is particle stable. Its mass excess is 59.77 MeV 53 (2017Wa10).
Theory:
Predictions and calculations for ground-state and excited-state parameters of 19B: 1985Po10, 1989De52, 1990Lo11, 1992Wa22, 1995Ho02, 1995Ho13, 1995Ka23, 1997Ba54, 1997Ho04, 2001Ka66, 2001Wa38, 2004An21, 2004La24, 2006Ko02, 2012Yu07.
Discussions of cluster structure and possible neutron-halo structure of 19B: 1994Fe01, 1995Fe08, 1995Gu07, 1999Ta09, 2000Gu04, 2000Ma28, 2001Mb02, 2001Ta04, 2002Gu10, 2002Ho05, 2005Ar12, 2005Ka02, 2005Li22, 2006Li31, 2007Fr22, 2010Gu15, 2010Ma38, 2012Fo18, 2015Ha20, 2015Ka02, 2016Xi04, 2017Ah08.