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

The possible existence of a particle-stable ⁵H is discussed by (1957BL1A) who point out that a T = 3/2 level of ⁵He - ⁵Li might plausibly be formed by combination of ³H or ³He and a deuteron in the singlet (T = 1) state at an energy ≈ 2.3 MeV higher than the known 16.7 - 16.8 MeV level. If such a level exists, calculation of Coulomb corrections and n - ¹H mass difference suggests a mass excess of 32.22 MeV for ⁵H, which would be 0.35 MeV stable against ³H + 2n. Presumably ⁵H would then decay by β-emission (≈ 19 MeV) followed by neutron emission (1957BL1A). A search for delayed neutrons from ⁷Li(γ, 2p)⁵H with 320-MeV bremsstrahlung yielded no evidence of formation of ⁵H (1958TA1A). It is concluded that less than 1% of the expected yield of ⁷Li(γ, 2p)⁵H leads to a particle-stable product (1958TA1A); see also (1958CE1A). A reaction yielding ⁵H might be ³H(t, p)⁵H with Q ≈ -8.1 MeV, assuming the mass of ⁵H given by (1957BL1A).