BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Study of  solar activity correlations with     Fe-55 and Co-60 nuc
 leus  decay parameters
DTSTART;VALUE=DATE-TIME:20261030T144000Z
DTEND;VALUE=DATE-TIME:20261030T145500Z
DTSTAMP;VALUE=DATE-TIME:20261101T124723Z
UID:indico-contribution-6352@cern.ch
DESCRIPTION:Speakers: Sergey Mayburov (Lebedev inst. of physics)\nTemporal
   variations of  nucleus decay parameters studied extensively in  last yea
 rs\,   their observation can be  signal of  unknown physical effects of co
 smic origin\, in particular\, induced by solar influence. Several experime
 nts reported annual and daily decay rate oscillations  in α- and β-decay
 s of some  nuclides at the level of .01 % [1]. Also\, correlations of  Mn-
 54  β-decay rate with   solar activity\, in particular\, with X-ray solar
  flares\,  reported [2]. BSTU - PhIAN - ITEP collaboration studies  decay 
 rate correlations for Co-60  β-decay and Fe-55 inverse β -decay with sol
 ar activity.\n          Possible influence of  solar activity on nucleus d
 ecay rates was studied during 2022 – 2026 for Fe-55 and  Co-60  isotopes
  by means of decay γ-ray   registration  by semiconductor detectors.   24
  significant decay  rate deviations from expected exponential decay rate o
 f the order .3 %  with duration from 50 to 188 hours  were found [3\,4]. I
 t was shown that such rate deviations occur  20 – 80 hours before intens
 e solar flare event with reliability of 90%.\n        X-ray ionizing radia
 tion produced during intense solar flares can be significant danger for as
 tronaut health and satellite instrument functioning\, hence development of
  corresponding  warning systems   can  improve radiation safety of space f
 lights. “Raspad” project realized now to perform  measurements of Fe-5
 5\, Co-60 decay rate parameters at International Space Station and Earth l
 abs to check such methodics  \napplicability for that purpose. \n\n      \
 n      1. E. Alekseev et al. \, Phys. Part. Nucl. 47\, 1803 (2016)\; ibid.
  49\, 557 (2018)\n      2. E. Fischbach et al. \, Rev. Space Sci. 145\, 28
 5 (2009)\; Astrop. Phys. 59\, 47 (2009)\n      3. S. Bogachev  et al.   J.
  Phys.: Conf. Series 1690\, 012028-012035 (2020)\n      4. S. Mayburov et 
 al.  Phys. Part. Nucl. 56\, 861 (2025)\n\nhttps://indico.particle.mephi.ru
 /event/626/contributions/6352/
LOCATION: Conference Hall 1
URL:https://indico.particle.mephi.ru/event/626/contributions/6352/
END:VEVENT
END:VCALENDAR