KnE Energy

ISSN: 2413-5453

The latest conference proceedings on energy science, applications and resources

Register for Content Alerts
Navigation

New Neutron Lifetime Measurements with the Big Gravitational Trap and Review of Neutron Lifetime Data

Published date: Apr 09 2018

Journal Title: KnE Energy

Issue title: The 3rd International Conference on Particle Physics and Astrophysics (ICPPA)

Pages: 121–128

DOI: 10.18502/ken.v3i1.1733

Authors:
Abstract:

Neutron lifetime is one of the most important physical constants which determines parameters of the weak interaction and predictions of primordial nucleosynthesis theory. In our experiment we measure the storage time of UCN in the material trap coated with a hydrogen-free fluorine-containing polymer (Fomblin grease UT-18). The stability of this coating to multiple thermal cycles between 80 K and 300 K was tested. The achieved storage time is only 1.5% less than free neutron lifetime. Using additional surface, which can be plunged into the trap to change the collision frequency of UCN with walls, we calculate free neutron lifetime by extrapolation to zero collision frequency. The result of the measurements with this new experimental setup is

References:

[1] H. Abele et al., Eur. Phys. J. C, vol. 33, no. 1, 2004.


[2] A. Czarnecki, W. Marciano, A. Sirlin, Phys. Rev. Lett., vol. 99, p. 032003, 2007.


[3] A. V. Chechkin, A. V. Ivanchik, A. P. Serebrov, S. V. Bobashev, Tech. Phys., vol. 61, no. 7, pp. 1101-1105, 2016.


[4] V. K. Ignatovich, The Physics of Ultracold Neutrons, Oxford: Clarendon, 1990.[5] A. P. Serebrov, V. E. Varlamov, A. G. Kharitonov et al., Phys. Lett. B, vol. 605, pp. 72-78, 2005.


[5] A. P. Serebrov, V. E. Varlamov, A. G. Kharitonov et al., Phys. Lett. B, vol. 605, pp. 72-78, 2005.


[6] A. P. Serebrov, V. E. Varlamov, A. G. Kharitonov, et al., Phys. Rev. C, vol. 78, no. 035505, pp. 1-15, 2008.


[7] A. P. Serebrov, A. K. Fomin, A. G. Kharitonov et.al., Tech. Phys., vol. 58, no. 11, pp. 1681-1687, 2013.


[8] R. W. Pattie Jr., N. B. Callahan, C. Cude-Woods et al., arXiv:1707.01817, 2017.


[9] S. Arzumanov, L. Bondarenko, S. Chernyavsky et. al, Phys. Lett. B, vol. 745, pp. 79- 89, 2015.


[10] V. F. Ezhov, arxiv1412.7434, 2014.


[11] A. T. Yue, M. S. Dewey, D. M. Gilliam et al., Phys. Rev. Lett., vol. 111, no. 22, 2013.


[12] A. Steyerl, J. M. Pendlebury, C. Kaufman, et al., Phys. Rev. C, vol. 85, no. 065503, pp. 1-14, 2012.


[13] A. Pichlmaier, V. Varlamov, K. Schreckenbach, P. Geltenbort, Phys. Lett. B, vol. 693, pp. 221-226, 2010.

Download
HTML
Cite
Share