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Yosio MUTÔ, Kentaro YANO
1936 Volume 18 Pages
1-9
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Takahiko YAMANOUCHI
1936 Volume 18 Pages
10-22
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Takahiko YAMANOUCHI
1936 Volume 18 Pages
23-34
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Seishi KIKUCHI, Kôdi HUSIMI, Hiroo AOKI
1936 Volume 18 Pages
35-49
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The γ-rays emitted by proton-neutron fnteraction were obscrved. The cross-seation for the process was found to He between 1.0-0.36×10
-25cm
2 The energy rot the γ-ray quantum emitted by this interaction was determined by the method of ooincidence of two counters and was found to be (2.2±0.1)×10
6 e.V. The absorption curves of the secondary electrons due to γ-rays excited in Cd, Cl, On and Fe by slow neutrons were also determined. In the cases of Cd, Ca and Fe, we observed that there existed press of more than 1×l0
7 e.V. in quantum energy
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Hedetosi ARAKAWA, Motozi YOSITAKE
1936 Volume 18 Pages
51-59
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Teturo INUI
1936 Volume 18 Pages
60-98
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Teturô INUI
1936 Volume 18 Pages
99-113
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Seishi KIKUCHI, Hiroo AOKI, Kôdi HUSIMI
1936 Volume 18 Pages
115-127
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The emission of γ-rays from numerous substances traversed by fast neutrons (2 m.e v.) has been confirmed, and the relative cross sections of the effect have been determined for 32 elements and are tabulated in Table I. The absolute value of the cross sections could only be estimated very roughly and may probably be of the order of 5×l0
-25 cm
2 for Cu. For six elements, Sn, Cd, Zn, Cu, Ni, and Fe, which emit γ-rays most abundantly, the quantum energiens of the radiations have been determined by the absorption curve of secondary electrons using the usual method of coincidence of two counters. They are all of very similar character and though the energy of most of the secondary electrons lies under the kinetie energy of the primary neutrons there were some indications of the presence of harder components Absorption of secondary electrons due to γ-rays excited by slow neutrons were also obtained for the above six elements. In every ease, except Sn, the rays are distinctly harder in the case of slow neutrons
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Hideki YUKAWA, Shoichi SAKATA
1936 Volume 18 Pages
128-130
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The probalility of the K electron absorption of the nucleus was cnlculafed according to the modified theory of Konopinski and Uhlenbeck instead of Fenmi's theory. No essential difference of the results was found between two eases
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Tokio TAKÉUCHI
1936 Volume 18 Pages
131-132
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L'anteur se propose de deriver la loi de Wien pour le rayonnement blane emis par un gaz non parfait dans une paroi claude, du point do vue de la theorie du chronostat
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Brij Mohan MEHROTRA, M.A.
1936 Volume 18 Pages
133-134
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Atuo KOMATU
1936 Volume 18 Pages
135-141
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Kentaro YANO, Yosio MUTO
1936 Volume 18 Pages
142-152
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The principal object if this paper is to study on the deviation of geodesies in a Riemannian space, especially in a Riemannian space of constant curvature, using the properties of the fundamental scalar. Mr. J. L Synge has studied on the deviation of geodesics in such a space, and obtained some res- ults coneerning this subject. But When we utilise the fundanental scalar in.a Riemannian space introdluced by Mr. II. S. Ruse, we can state more precisely the results obtained by Mr. J. L. Synge
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Tatsuo TAKAHASHI, Fu Traing WANG
1936 Volume 18 Pages
153-156
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Hideki YUKAWA, Yukihiko MIYAGAWA
1936 Volume 18 Pages
157-166
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The cross section of the nuclear disintegration by neutron impact with proton emisslon was calculated on the assumption that the emitted proton can be identified with the impinging neutron and was found to have the order of magnitude φdis≈10
-24/√E10
-0.4L Z/√E-D+ 0.65Z
3/2 in ordirary case, where Z is the atomic number of the initial nuelcue and E and D are the energy of the neutron and the clangs of total proper'- mass by disintegration, both in the unit of 106eV. The expresseions of the cross sections of the elastic stuttering and the capture of the neutron are altered by taking the possiblity of the above process into account and take rather compli- cated forms. the ratio of which can be either larger or smaller than 1 and can fluctuate as Z changes. Nevertheless, the anomalus absorption of the slow neu- tron without comparable scattering can hardly be expected from our result
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Sôichi KAKEYA
1936 Volume 18 Pages
167-172
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Yosiro TUMURA
1936 Volume 18 Pages
173-181
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KWOK PING LEE
1936 Volume 18 Pages
182-187
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Seishi KIKUCHI, Kôdi HUSIMI, Hiroo AOKI
1936 Volume 18 Pages
188-209
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The cross sections of 34 e'ements for gamma-ray excitation by slow neutrons were determined, slow neutrons being defined by the large absorption of them in horon. The parallelism between these cross sections and the absorption scattering cross sections obtained by Dunning and others was discussed. It. was found that one twentieth of slow neutron absorption in boron results in the emi- ssion of gamma-rays, which are probably very soft. The comparison with the cor- responding cross section by fast neutrons obtained in our previous experiment was made, and an indicated parallelism between them was suggested. The absorption curves of the secondary electrons of gamma rays from 24 elements were obtained by means of the method of coincidence of two counters and the quantum energy of the hardest gamma-rays were determined from the end points of the absorptiom curves. It was found that there exists a marked relation between the energy of the hardest gamma-rays and the atomic number and it was compared with that between packing fraction and the atomic number. The existence of some possible level systems in atomic nuclei is suggested
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Yuzuru WATASE, Seishi KIKUCHI
1936 Volume 18 Pages
210-224
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Yosio MUTO
1936 Volume 18 Pages
225-232
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Tokio SAKURAI
1936 Volume 18 Pages
233-256
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Francesco SEVERI
1936 Volume 18 Pages
257-267
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Tokiharu OKAYA
1936 Volume 18 Pages
268-279
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Yosomatsu TAKAMURA
1936 Volume 18 Pages
280-286
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Masao NOTUKI
1936 Volume 18 Pages
287-295
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Seishi KIKUCHI, Hiroo AOKI, Kôdi HUSIMI
1936 Volume 18 Pages
297-304
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Syôten OKA
1936 Volume 18 Pages
305
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Genjiro OKUNO
1936 Volume 18 Pages
306-318
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Seitaro SUZUKI, Hideo N.AGASIMA
1936 Volume 18 Pages
319-322
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Ball anaele of sealing wax, elalk-powder, plaster of paris or “castone ”pluter are broken by there metlunls; i.e the exple sion of tone' powder, the falling of a ball upon a massive iros plate, and the eolilson of two balls hung like pendulms The breken plees ent be gronpel lato two kinds One of then is eonposed of the large piees and the other, the small ones. Gmeerning the former gronp. the fol lowiag proertied are reegnized: The veloeity of esch brokten plere tends to derrase with the inerease of mass while the kinetie energy tends to inerease The energy expended in beraking halls when dropped upon the iren plate, is as follows: Balls made of ehalk-powder..... 97-98% (of the total kinelie energy), Balls made of sealing-wax ..... ..70-80%; ( ditto ), Balls made of Gastone plauter..alxout 90%( ditto). In the ease of explosion, the broken piees rotate at remarkable spend. as they fly throngh the air. Some, for insanaee. even maker 20 rotntions Verseeond. Further, some experiments to find the strain-distribution. at the instant of larakage were tried
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Kiugoro KITAGAWA
1936 Volume 18 Pages
323-330
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Den resultats reemment chereches none amencent a penmer qu'll y a nouvelle signiflcation de 1'deart type total de dispersion.11 a'rxprlme sousIs formule tres appronchee, en tenant eompte de sa vaildse. On pent evaluer par lul le merltre de robservation et I'hablltd de I'obaervatenr. On cherche ses extensians solt a l'ellipse soft a 1'elliyeoide de pobabllte avec ses applications notemnent rapportdes an tir
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Okuro OIKAWA
1936 Volume 18 Pages
331-344
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Kiyoshi MURAKAWA
1936 Volume 18 Pages
345-347
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Makoto KIMPARA
1936 Volume 18 Pages
349-352
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Shin-ichi TAKAHASHI
1936 Volume 18 Pages
353-355
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Tokio SAKURAI
1936 Volume 18 Pages
356-371
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Tasaburô YAYAGUTI
1936 Volume 18 Pages
372-379
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Kiyoshi MURAKAWA
1936 Volume 18 Pages
380-401
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Otohiko NOMOTO
1936 Volume 18 Pages
402-424
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Beniamino SEGRE
1936 Volume 18 Pages
425-426
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Susumu TOMOTIKA
1936 Volume 18 Pages
427-435
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In the present short note, an alternative analysis is developed for a kind of DIRICHLET s problem. The problem here considered is that of finding the expression for an analytie function which is everywhere regular in a ring region bounded by two concentric eircles, as we11 as on the bounding circles, and whose real part on the outer circle takes an assigned value and whose imaginary part on the inner circle is nil. It is shown that the formula solving the problem can be derived directly from CAUCHY s theorem, by using in addition RIEMANNSCHWARZ s principle of reflection. In conclusion, I would like to express my thanks to my colleague, Prof. T. SUIMIZU, Mathematical Institute, Osaka Imperial University, for vahuible criticisms
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Isao IMAI
1936 Volume 18 Pages
436-459
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Hidetosi ARAKAWA
1936 Volume 18 Pages
460-468
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Hiroei HASUNMA
1936 Volume 18 Pages
469-489
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The Stark-effect an the α-disgonal bands of HD and D
2, was observed with a spectrograph of 10-7 A/mm dispersen. The field strength ranged from 100 KY/tea to 210 KV/cm. The comparlion of the effect In three molecules H
2, HD and D
2, shows that they occer roughly with the same magnitudes but there is no corresponding similarity among them. This is what may be theoretically expected
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Yosomatsu TAKAMURA
1936 Volume 18 Pages
491-496
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Takeo NAGAMIYA
1936 Volume 18 Pages
497-506
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Hideki YUKAWA
1936 Volume 18 Pages
507-518
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The energy distribution of neutrons sunned down by a thin plate containing hydrogen, whose thickness Is small compared with tie mean free path of the incident neutrons of definite energy. Is calculate I for following, eases taking only the single and t. a double scatterings into account
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Syôten OKA
1936 Volume 18 Pages
519-523
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Syôten OKA
1936 Volume 18 Pages
524-534
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Susumu TOMOTIKA
1936 Volume 18 Pages
535-549
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