SCIENTIFIC - COSMIC RAYS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000600250285-8
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 3
• Document Creation Date: December 22, 2016
• Document Release Date: July 5, 2011
• Sequence Number: 285
• Publication Date: September 12, 1949
• Content Type: REPORT

Sanitized Copy Approved for Release 2011/07/06: CIA-RDP80-00809A000600250285-8
CLASSIFICJN
CENTRAL INTELLIGENCE
INFORMATION FROM
FOREIGN DOCUMENTS OR RADIO BROAD"
COUNTRY USSRx
SUBJECT Scientific - Cosmic rage
HOW
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THIS IS UNEVALUATED INFORMATION
10
The reguia. meeting of the Department of Phyeicomathexatieai doieneed of
the Academy of Sciences USSR on January 23, 19h7 was entirely devoted to
a discussion of new data, obtained during 1946, or. cosmic rays.
At the morning me.tiag were read the worke of the Alagoz High-Altitude
14rpedition of the Acedcmy of ScienocaArmenian SSR, made jointly with the
Aoadeny of Sciences USSR. Tha expedition had investigated and eetabliehed,
beyond all ;oe :Ica, the ixiai;ence of a new elementary particle with a
mass ir'?rmedi `.' betvesn the maa3ee of the meann and proton.
e ? A_arl;anyau, Cnrresponding Member, Academy of SciencesU&4R,
recallev in his report that the Alagez Erpe.3 Lion had demonstrated in its
previous studies the presence In coipaic rays of a "third" component, apart
from the so-called "hard" and "soft" components, whose nature was still
unknown. It was demonstrated, in particular, that the "third" component
generates particles with ionization power two to three times higher than the
Sorization power of relativistic mesons.
in 1946, Alikhan an, Alikhanov, and Vaysenberg conducted, at an altitude
of 3,200 meters,an extremely accurate investigation of the deviation of the
components or jcsmic radiation in the magnetic field (4,000 oersteds). The
particles were sorted by means of a 5.4-centimeter lead plate; the latter
process made It possible to separate the hard meson component.
It was established that of the aggregate stream of particles, approxi-
mately 10 percent were particles with slight deviation in a magnetic field
and, at the same time, with small penetrating power. I. was established by
special tests that the particles could not belong to any type already known.
Starting from the values of the impulse (found from the deviation in a arctic
field) and energy of the particle (obtained from measuring its penetrating
power), their mass was estimated to lie in the interval from 600 to 900
eieotroi. masses. The particles carry both positive and negative charges, but
the number of particles with a positive charge is somewhat greater than those
with a negative charge. The nevly discovered particle was given the name
`barit.ro- v The ccxperimentnl data point to the possibility of existence of
hrarcns with different mass up to e size exceeding the proton's mnea.
A:rte., b K'.,1?1G CRy
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CLASSIFICATION iM"`' 1.
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with the aid of an ionization ;,elescope; A pub o t$o1Yati
the measurement of the. ^aine Of ionization inpulaee Mhi :
made it possible to carry on'simultaneoae c50ntr4otr t17ir;'Ai6Y"v(.<
a soft. component produce ionization three times greater,the3 Ao mpaonq.
baritron's small penetrating power forces one to suppose that it is generated
near the measuring equipment by the "third" component, which could also be
the cause cf generation of "stare."
At the evening meeting V. I. Veksler, Corresponding Vamber, Academy of
Sciences USSR, reported on certain new data on the composition of eoemit~ ra;n.
This data was culled from information obtained t., 1946 by the Pamir Expedition
of the Institute of Physic., Academy of Sciences USSR. The work was conducted
at an altitude of 4,800 meters. The beeic objective of the eerier of investi-
gations was to determine the nature of radiatio:- ca:e'_rg nuclear f!aeor.
Kurnonova and Lubimov re orted on their discovery the in a t.:ick layer
of lead (10 centimeters and more), shuwe-?e a.s genera,-6 which ere different
from delta showers cawed by ordinary meeao.,a. TLcl o1,Ne correlation ba;. , -en
thv. showers canned by h^aritrona and r:srrow at,a:ospheric showers was establishd
at the same time. It was shown by very careful *_neaourment that the component
generating showers in lead was absorbed in dense matter considerably leee the.
in the equivalent thickness of air. The latter phenomenon could be explained
either by disintegration of the generating particles (however, insofar as
they could not be ordinary mesons, they must be some new particles) or, leer
probable, by the presence of a complicated transitional effect. Thera are
reasons to suppose that the formation of the particular shower@ discovered
is connected with nuclear fission.
Shcherbekova and Besotoeniy had established, with the aid of proportional
counters, a cloee correlat.ion between nuclear fisbicn and _arro-x etmoopheric
showers. which points to the presence in the latter of a component extremely
effoctive with respect to the generetio:, of nuclear fier,to::.. In sgreemezt
with dat_g, obtained by other scientific workers (and by different methcda), it
was shown that a considerable namber of particles forming the generating
component are no':ior.izing.
Gorb:ince '?orked our a+ third method of otudiitg .,clear fieaion by using
coupled prcport.io:.al counters of arecial design. He had estsbllahed the fact
nuclear fisu'_or has penetrating
that the bees,-. Tor' of a composer*_ ger ra,: iruq
cower. Prello:rary ic9loetlor,e of the reraibllity of the ge.:erO~ trig ccmponent'a
f1ocnaegra: .. :ntAined on the basis -.f degr?c of eba'rr,lo_: in dense
matter _nd th:: ?r.~.,oho: .
CONFIPT-MT .
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m
At an altitude of 3,860 metre the
was found to be of the same order as tYge: '
the inevitablo conclusion that the general
The aum total of the reprinted exert
~
to ligh., a series of new phenomena o1oee4.
r
rays, probably Indicating the existence of a 3, I
neutral particle.
Those taking part in the discussion were Aoa~SesE70'.e , . a
are V. A. Fok, Corresponiding Member' B. M.. Vu11~ D arp - JP e
cal 9cienceE N. A. Dotrotin and S. 2. Helen?ekiy, 'P'rofe?ipxa T. L.
and D. D. Ivanonko, and others.
50X1-HUM
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CO11FI Ft T1.41
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