Temperature dependence of the probability of "small heating" and total losses of ucns on the surface of fomblin oils of different molecular mass - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue European Physical Journal C: Particles and Fields Année : 2019

Temperature dependence of the probability of "small heating" and total losses of ucns on the surface of fomblin oils of different molecular mass

Résumé

We measured the temperature dependence of the probability of small heating and total losses of UCNs on the PFPE Fomblin Y surface with various molecular masses Mw=2800, 3300, 6500 amu in the temperature range of 100-300 K. The probability of small heating sharply decreases with increasing Mw and decreasing temperature. The probability of total loss weakly decreases with decreasing temperature and takes the minimum value at Mw=3300 amu. As this oil provides a homogeneous surface with minimal probabilities of small heating and total losses of UCNs, it is the preferred candidate for experiments on measuring the neutron lifetime.

Dates et versions

hal-02110429 , version 1 (25-04-2019)

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S. M. Cherniavsky, E. V. Lychagin, A. Yu. Muzychka, G. V. Nekhaev, V. V. Nesvizhevsky, et al.. Temperature dependence of the probability of "small heating" and total losses of ucns on the surface of fomblin oils of different molecular mass. European Physical Journal C: Particles and Fields, 2019, 79, pp.329. ⟨10.1140/EPJC/S10052-019-6835-Z⟩. ⟨hal-02110429⟩
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