Zobrazeno 1 - 10
of 126
pro vyhledávání: '"Pokotilovski, Yu."'
The experimental setup for examining the low-molecular-weight fluoropolymer CF$_{3}$(CF$_{2})_{3}$-O-CF$_{2}$-O-(CF$_{2})_{3}$CF$_{3}$, which is a promising coating material for the walls of storage chambers for ultracold neutrons, is described. The
Externí odkaz:
http://arxiv.org/abs/1811.01859
Autor:
Belgya, T., Borzakov, S. B., Jentschel, M., Maroti, B., Pokotilovski, Yu. N., Szentmiklosi, L.
Publikováno v:
Phys. Rev. C 99, 044001 (2019)
We performed an experimental search for the bound state singlet deuteron predicted in some microscopic calculations. The predicted energy of this metastable level is in vicinity of the deuteron disintegration threshold. This state should manifest its
Externí odkaz:
http://arxiv.org/abs/1809.00680
Autor:
Pokotilovski, Yu. N.
This year is 50 anniversary of the first experimental observation of ultracold neutrons (UCN). I present my reminiscences of the first experiment in Dubna, first encounter with F.L. Shapiro -- pioneer of the UCN investigations, and the early stage of
Externí odkaz:
http://arxiv.org/abs/1805.05292
Autor:
Pokotilovski, Yu. N.
Publikováno v:
Pis'ma v ZhETF 96 (2012) 841-843; [JETP Lett. 96 (2012) 751-753]
The chameleon scalar field is considered as a possible cause of accelerated expansion of the Universe. The chameleon field induces an interaction potential between a particle and a massive body. Previous experiments with falling cold neutrons intende
Externí odkaz:
http://arxiv.org/abs/1311.5720
Autor:
Pokotilovski, Yu. N.
Publikováno v:
Pis'ma v ZhETF 96 (2012) 221-225 [JETP Lett. 96 (2012) 205-209]
An experimental opportunity is presented for the future to measure possible P- and T-non-invariant axion-like interaction between nucleons in a Fm range. This interaction may be searched for in the measurement spin-dependent asymmetry of scattering o
Externí odkaz:
http://arxiv.org/abs/1311.5033
Autor:
Pokotilovski, Yu. N.
Publikováno v:
ZhETF 143 (2013) 701-712 [JETP 116 (2013) 609-619]
We discuss the potential of the neutron Lloyd's mirror interferometer in a search for new interactions at small scales. We consider three hypothetical interactions that may be tested using the interferometer. The chameleon scalar field proposed to so
Externí odkaz:
http://arxiv.org/abs/1311.4679
We performed an experimental search for the bound state singlet deuteron predicted in some microscopic calculations. The experiment consists in a high statistics measurement of gamma ray spectra after thermal neutron capture by hydrogen nuclei. The u
Externí odkaz:
http://arxiv.org/abs/1308.1783
Autor:
Pokotilovski, Yu. N.
Publikováno v:
Physics Letters B719 (2013) 341-345
The consideration is presented of possible neutron Lloyd's mirror interferometer experiment to search for strongly coupled chameleon fields. The chameleon scalar fields were proposed to explain the early and late time acceleration of expansion of the
Externí odkaz:
http://arxiv.org/abs/1203.5017
Autor:
Pokotilovski, Yu. N.
Publikováno v:
Nucl. Instr. Meth. A675 (2012) 29-33
The extraction efficiency of ultracold neutrons from cryogenic moderators depends critically on the neutron transparency of the moderator material. The Monte Carlo simulation of the probability of the UCN going out from non-ideal (disordered) solid d
Externí odkaz:
http://arxiv.org/abs/1111.1963
Autor:
Pokotilovski, Yu. N.
Publikováno v:
Pis'ma v ZhETF, 94 (2011) 447 [JETP Lett. 94 (2011) 413]
The consideration is presented of possible neutron experiments to search for new short-range spin-dependent forces. The spin-dependent nucleon-nucleon interaction between neutron and nuclei may cause different effects: phase shift of a neutron wave i
Externí odkaz:
http://arxiv.org/abs/1107.1481