Re: Why hydrogen does not have a neutron?

"Uncle Al" wrote

>>> He-3 + Be-9 -> 3He4 + 19.00421 MeV
>> I can think of several reaction pathways that do not require 'surmounting
>> the coulombic barrier'.
>> 3. virtual gamma + Be9 -> 2He4 + n
>> Efficiency = 1/(1+(r/R0)^6) R0 is the distance at which the efficiency is
>> 50%. So long as the dimensions are small, process 3. is favored.
>
> Virtual gammas exert their influence over a short distance. Many reactions
> are possible.
>
> A. He4* + He4 -> He4 + He4*
>
> Equation A. says that the way to exploit the benefits of virtual gammas
> within a civilian thermonuclear power reactor is by the use of high
> pressure helium [snip]

Issues concerning resonance energy transfer between nuclear energy levels
and between nuclear and electronic levels are at the 'leading edge" of
science. The book chapter abstracted below discusses resonance energy
transfer between atomic and nuclear transitions.

From:
http://www.springerlink.com/app/home/contribution.asp?wasp=d90dee6d12254602a85b7f2e0fd7e021&referrer=parent&backto=issue,9,17;journal,10,50;linkingpublicationresults,1:101746,1

Hyperfine Interactions
Publisher: Springer Science+Business Media B.V., Formerly Kluwer Academic
Publishers B.V.
ISSN: 0304-3843 (Paper) 1572-9540 (Online)
DOI: 10.1023/A:1024069214606
Issue: Volume 143, Numbers 1-4

Date: March 2002
Pages: 69 - 78
Possibility of Combining Nuclear Level Pumping in a Plasma with Lasing in a
Solid
S. A. Karamian1 and J. J. Carroll2

(1) Joint Institute for Nuclear Research, 141980 Dubna, Russia
(2) Department of Physics and Astronomy, Center for Photon-Induced
Processes, Youngstown State University, Youngstown, 44555, Ohio, USA

Abstract

Nuclear isomers can be used for the storage and release of clean nuclear
energy and several triggering schemes have been discussed. Here the
possibility to utilize resonance between atomic and nuclear transitions in
the form of a hybridization of atomic-nuclear excitation is considered.
Several isotopes and specific nuclear levels are identified as candidates
for triggering via atomic transitions. A variety of ionization states and
atomic-shell configurations arises in a hot plasma generated by short
high-power pulses of laser light. The non-radiative conversion of the
ionization energy within an atom can be suppressed in the hot plasma
surroundings. The time scales of different processes in nuclear, atomic and
condensed-matter subsystems are compared and the fast ionization in a solid,
X-ray radiance in a plasma, and sample melting and recrystallization may
precede nuclear fluorescence. A time scale shorter than 0.1 ns makes this
sequence promising for the collective excitation of short-lived modes in a
nuclear subsystem.

laser pulse - solid - ionization - characteristic transition - nuclear
excitation - ablation - recrystallization - fluorescence - time scale






.

Relevant Pages