UCN Upscattering rates in a molecular deuterium crystal
| dc.creator | Liu, C. -Y. | |
| dc.creator | Young, A. R. | |
| dc.creator | Lamoreaux, S. K. | |
| dc.date | 2000-04-07 | |
| dc.date.accessioned | 2026-07-07T12:03:57Z | |
| dc.date.available | 2026-07-07T12:03:57Z | |
| dc.description | A calculation of ultra-cold neutron (UCN) upscattering rates in molecular deuterium solids has been carried out, taking into account intra-molecular exictations and phonons. The different moelcular species ortho-D2 (with even rotational quantum number J) and para-D2 (with odd J) exhibit significantly different UCN-phonon annihilation cross-sections. Para- to ortho-D2 conversion, furthermore, couples UCN to an energy bath of excited rotational states without mediating phonons. This anomalous upscattering mechanism restricts the UCN lifetime to 4.6 msec in a normal-D2 solid with 33% para content. | |
| dc.description | 3 pages, one figure | |
| dc.identifier | https://arxiv.org/abs/nucl-ex/0004003 | |
| dc.identifier | http://arxiv.org/abs/nucl-ex/0004003 | |
| dc.identifier | Phys.Rev.B62:R3581-R3583,2000 | |
| dc.identifier | doi:10.1103/PhysRevB.62.R3581 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207971 | |
| dc.subject | Nuclear Experiment | |
| dc.title | UCN Upscattering rates in a molecular deuterium crystal | |
| dc.type | text |