Acta Physica Sinica - //m.suprmerch.com/ daily 15 2024-11-21 09:34:08 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-11-21 09:34:08 zh Copyright ©Acta Physica Sinica All Rights Reserved.  Address: PostCode：100190 Phone: 010-82649829，82649241,82649863 Email: apsoffice@iphy.ac.cn Copyright ©Acta Physica Sinica All Rights Reserved apsoffice@iphy.ac.cn 1000-3290 <![CDATA[纪念Α.Φ.约飞院士]]> //m.suprmerch.com/en/article/doi/10.7498/aps.17.251


Acta Physica Sinica. 1961 17(6): 251-254. Published 1961-03-05 ]]>


Acta Physica Sinica. 1961 17(6): 251-254. Published 1961-03-05 ]]> 1961-03-20T00:00:00+00:00 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1961 17(6): 251-254. article doi:10.7498/aps.17.251 10.7498/aps.17.251 Acta Physica Sinica 17 6 1961-03-05 //m.suprmerch.com/en/article/doi/10.7498/aps.17.251 251-254 <![CDATA[β-СПЕКТРОМЕТР С ПРОМЕЖУТОЧНЫМ ИЗОБРАЖЕНИЕМ]]> //m.suprmerch.com/en/article/doi/10.7498/aps.17.255


Acta Physica Sinica. 1961 17(6): 255-262. Published 1961-03-05 ]]>


Acta Physica Sinica. 1961 17(6): 255-262. Published 1961-03-05 ]]> 1961-03-20T00:00:00+00:00 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1961 17(6): 255-262. article doi:10.7498/aps.17.255 10.7498/aps.17.255 Acta Physica Sinica 17 6 1961-03-05 //m.suprmerch.com/en/article/doi/10.7498/aps.17.255 255-262 <![CDATA[THE DIRECT PRODUCTION OF ELECTRON PAIRS BY HIGH ENERGY CHARGED PARTICLES]]> //m.suprmerch.com/en/article/doi/10.7498/aps.17.263

We describe in this paper an experiment using a cloud chamber in a magnetic field of 6200 gauss to determine the average total cross-section of the direct production of electron pairs in aluminium by high energy electrons generated in cascade showers and having energies larger than 30 Mev. We have found after correcting for the spurious events 8.1 electron tridents, which were produced actually by electrons. This figure corresponds to a mean free path of 672±585 cm. or an average total cross-section of (0.25± 0.22)×10-25cm2, for trident production. In the treatment of data, the elimination of spurious tridents has been appropriately considered. The formulas of the total cross-section derived by Bhabha and by Murota et al have been applied in accordance with our experimental conditions to compute the total cross-section. Finally, comparison between the theoretical and experimental values has been made. Our experiment is in fair agreement with the theory of Murota et al. While not in contradiction with that of Bhabha.


Acta Physica Sinica. 1961 17(6): 263-272. Published 1961-03-05 ]]>

We describe in this paper an experiment using a cloud chamber in a magnetic field of 6200 gauss to determine the average total cross-section of the direct production of electron pairs in aluminium by high energy electrons generated in cascade showers and having energies larger than 30 Mev. We have found after correcting for the spurious events 8.1 electron tridents, which were produced actually by electrons. This figure corresponds to a mean free path of 672±585 cm. or an average total cross-section of (0.25± 0.22)×10-25cm2, for trident production. In the treatment of data, the elimination of spurious tridents has been appropriately considered. The formulas of the total cross-section derived by Bhabha and by Murota et al have been applied in accordance with our experimental conditions to compute the total cross-section. Finally, comparison between the theoretical and experimental values has been made. Our experiment is in fair agreement with the theory of Murota et al. While not in contradiction with that of Bhabha.


Acta Physica Sinica. 1961 17(6): 263-272. Published 1961-03-05 ]]> 1961-03-20T00:00:00+00:00 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1961 17(6): 263-272. article doi:10.7498/aps.17.263 10.7498/aps.17.263 Acta Physica Sinica 17 6 1961-03-05 //m.suprmerch.com/en/article/doi/10.7498/aps.17.263 263-272 <![CDATA[СЧЁТЧИКИ С УПРАВЛЯЕМЫМ ИМПУПЬСНЫМ ПИТАНИЕМ(Ⅰ)]]> //m.suprmerch.com/en/article/doi/10.7498/aps.17.273


Acta Physica Sinica. 1961 17(6): 273-286. Published 1961-03-05 ]]>


Acta Physica Sinica. 1961 17(6): 273-286. Published 1961-03-05 ]]> 1961-03-20T00:00:00+00:00 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1961 17(6): 273-286. article doi:10.7498/aps.17.273 10.7498/aps.17.273 Acta Physica Sinica 17 6 1961-03-05 //m.suprmerch.com/en/article/doi/10.7498/aps.17.273 273-286 <![CDATA[奇—奇核Tb<sup>160</sup>,Ta<sup>182</sup>和Re<sup>186,188</sup>的转动能级]]> //m.suprmerch.com/en/article/doi/10.7498/aps.17.287


Acta Physica Sinica. 1961 17(6): 287-288. Published 1961-03-05 ]]>


Acta Physica Sinica. 1961 17(6): 287-288. Published 1961-03-05 ]]> 160,Ta182和Re186,188的转动能级]]> 1961-03-20T00:00:00+00:00 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1961 17(6): 287-288. article doi:10.7498/aps.17.287 10.7498/aps.17.287 Acta Physica Sinica 17 6 1961-03-05 //m.suprmerch.com/en/article/doi/10.7498/aps.17.287 287-288