Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Defi nitive Detection of Orbital Angular Momentum States in Neutrons by Spin-polarized 3He

Published

Author(s)

Terrence J. Jach, John Vinson

Abstract

A standard method to detect thermal neutrons is the nuclear interaction 3He(n,p)3H. The spin- dependence of this interaction is also the basis of a neutron spin-polarization filter using nuclear polarized 3He. We consider the corresponding interaction for neutrons placed in an intrinsic orbital angular momentum (OAM) state. We derive the relative, polarization-dependent cross-sections for neutrons in an L = 1 OAM state. The absorption of those neutrons results in states J = 0, 1, and 2. Varying the three available polarizations tests that an OAM neutron has been created and probes which states are physically possible. We describe the energetically likely excited states of 4He after absorption, due to the fact that the compound state has odd parity. This provides a de finitive method for detecting neutron OAM states and suggests that intrinsic OAM states offer the possibility to observe new physics, including anomalous cross-sections and new channels of radioactive decay.
Citation
Physical Review Letters
Volume
105

Keywords

neutron, orbital angular momentum, spin polarization, cross section, OAM, Helium-3

Citation

Jach, T. and Vinson, J. (2022), Defi nitive Detection of Orbital Angular Momentum States in Neutrons by Spin-polarized 3He, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevC.105.L061601, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933218 (Accessed May 18, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created May 11, 2022, Updated December 1, 2022