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Shoichi Matsuda
1951 Volume 6 Issue 3 Pages
131-135
Published: 1951
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Yoshiro Kainuma
1951 Volume 6 Issue 3 Pages
135-138
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Atuyosi Okazaki
1951 Volume 6 Issue 3 Pages
138-140
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Motoharu Kimura
1951 Volume 6 Issue 3 Pages
141-148
Published: 1951
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The temperature effect on the rate of spurious discharges in G. M. counters (hard glass sealed-off type with out-gassed cathode of 2 cm φ×5 cm) was observed when they were heated and cooled at constant rates. As shown in Fig. 2∼9, on the heating stage, the rate of natural counts increased in various manners which depended on the filling gases and on the cathode material, and decreased rapidly on the cooling stage without exception. It was verified that these discharges were due to the so-called. “Spontanentladung” of Trost and the occurrence of the double or triple discharges (Nachentladung) was very small. The plateau curves were taken with gamma ray source and also without any source before and after each experiment, and we could not find marked changes in them, though those with natural counts became generally better after cooled. The plateau lengths were generally between 100 to 500v, with the, slopes of 0.6% to 10%/100v. The counts decreased exponentially with the square root of time when the counter was kept at constant temperature near 100°C after raised to that point. Tentative explanation can be made along the lines of so-called Malter effect of the thin oxide film of the cathode. But we can not neglect the effect of adsorption and evaporation of the quenching gas molecules and also the negative ions at the cathode surfaces.
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Gunji Shinoda, Teruichi Tomura
1951 Volume 6 Issue 3 Pages
148-152
Published: 1951
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A new type instrument for measurement of X-ray intensity with a G-M counter is described. The advantages of this counting rate meter are as follows; (1) statistical fractional standard deviations are constant throughout whole range of 1:10
4, (2) probable errors are also made constant by means of logarithmic scale, (3) the time required for reading is shorter in higher counting rate, and (4) therefore it is benefitable to measure the counting rate from natural counting to saturate counting with probable error less than 3% using 0.8% accuracy meter and with only one scale.
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Yukiyasu Oda, Jyumpei Sanada, Shôtaro Yamabe
1951 Volume 6 Issue 3 Pages
153-156
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Tetsuo Wakatsuki, Kenzo Sugimoto
1951 Volume 6 Issue 3 Pages
157-163
Published: 1951
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Total scattering cross sections for 37 elements have been measured for heterogeneous fast neutrons of mean energy 6.5 Mev. Irregular variations of cross sections with atomic weights were observed at magic number nuclei but they were not all smaller than the neighbouring nuclei as is the case for inelastic scattering or capture processes. It is probable that elastic scattering cross sections become large at those nuclei. Other large irregular variation of cross section was found at Ti.
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Ken-ichi Kusukawa
1951 Volume 6 Issue 3 Pages
163-165
Published: 1951
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Ken-ichi Kusukawa
1951 Volume 6 Issue 3 Pages
166-167
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Mitutosi Kawaguchi
1951 Volume 6 Issue 3 Pages
168-174
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Hidenori Hasimoto
1951 Volume 6 Issue 3 Pages
175-178
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Hisashi Horie
1951 Volume 6 Issue 3 Pages
179-184
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Taro Kihara
1951 Volume 6 Issue 3 Pages
184-188
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Ryumyo Ito
1951 Volume 6 Issue 3 Pages
188-191
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Kikusaburo Osada
1951 Volume 6 Issue 3 Pages
191-192
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Shozo Sawada, Shoichiro Nomura
1951 Volume 6 Issue 3 Pages
192-193
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J. Nishiwaki
1951 Volume 6 Issue 3 Pages
193-194
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Chiyoe Yamanaka, Tokuo Suita
1951 Volume 6 Issue 3 Pages
194-195
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Syoten Oka, Osamu Nakada
1951 Volume 6 Issue 3 Pages
195-197
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Tihiro Ohkawa
1951 Volume 6 Issue 3 Pages
197A
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Seiichiro Kumagai, Ituro Kimura
1951 Volume 6 Issue 3 Pages
197B-199
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Tosio Sakurai
1951 Volume 6 Issue 3 Pages
199-200
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Chisato Okazaki, Tokuo Suita
1951 Volume 6 Issue 3 Pages
200-201
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Nobuhiko Saitô
1951 Volume 6 Issue 3 Pages
201-202
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Minoru Oda, Tatuo Takakura
1951 Volume 6 Issue 3 Pages
202A
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Tokuo Suita
1951 Volume 6 Issue 3 Pages
202B-204
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Riitsu Takagi
1951 Volume 6 Issue 3 Pages
204A
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Y. Watase, S. Miyake, K. Suga, O. Kusumoto
1951 Volume 6 Issue 3 Pages
204B-206
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Ken-ichi Kusukawa
1951 Volume 6 Issue 3 Pages
206-207
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Shoji Kojima, Kiyoe Kato
1951 Volume 6 Issue 3 Pages
207
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Gen Shirane, Etsuro Sawaguchi, Yutaka Takagi
1951 Volume 6 Issue 3 Pages
208-209
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Ryuzo Ueda, Gen Shirane
1951 Volume 6 Issue 3 Pages
209-210
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Haruhiko Morinaga
1951 Volume 6 Issue 3 Pages
210-211
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Yasuo Kanai
1951 Volume 6 Issue 3 Pages
211-212
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Hiroshi Watanabe
1951 Volume 6 Issue 3 Pages
212-213
Published: 1951
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