Capture of Slow Neutrons in Light Elements
نویسندگان
چکیده
منابع مشابه
Balancing interferometers with slow-light elements.
In this Letter we show that interferometers with unbalanced arm lengths can be balanced using optical elements with appropriate group delays. For matched group delays of the arms, the balanced interferometer becomes insensitive to the frequency noise of the source. For experimental illustration, a ring resonator is employed as a slow-light element to compensate the arm-length mismatch of a Mach...
متن کاملThe Abundances of Light Neutron-Capture Elements in Planetary Nebulae
We present preliminary results from a large-scale survey of the neutron(n)-capture elements Se and Kr in Galactic planetary nebulae (PNe). These elements may be produced in PN progenitors by s-process nucleosynthesis, and brought to the stellar envelope by third dredge-up (TDU). We have searched for [Kr III] 2.199 and [Se IV] 2.287 μm in 120 PNe, and detected one or both lines in 79 objects, fo...
متن کاملRadiative capture of neutrons by protons
A model-independent irreducible tensor approach to p(n, γ)d is presented and an explicit form for the spin-structure of the matrix M for the reaction is obtained in terms of the Pauli spin-matrices σ(n) and σ(p). Expressing the multipole amplitudes in terms of the triplet → triplet and singlet → triplet transitions, we point out how the initial singlet and triplet contributions to the different...
متن کاملDirect radiative capture of p-wave neutrons.
The neutron direct radiative capture (DRC) process is investigated, highlighting the role of incident p-wave neutrons. A set of calculations is shown for the C(n; ) process at incoming neutron energies up to 500 keV, a crucial region for astrophysics. The cross section for neutron capture leading to loosely bound s, p and d orbits of C is well reproduced by the DRC model demonstrating the feasi...
متن کاملThe cytogenetic effect of slow neutrons.
HE study of the biological effect of different radiations has progressed T as sources of the various radiations have been developed. The effects of X, gamma, beta and alpha rays, of protons and fast neutrons, and recently of fission fragments have been studied in numerous organisms, both plant and animal. Before the development of the nuclear reactor, however, there was no source of slow neutro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1937
ISSN: 0028-0836,1476-4687
DOI: 10.1038/140895b0