The Determination of the Resonant Energies for Proton Capture by <sup>24</sup>Mg and <sup>25</sup>Mg below 550 keV, and Measurement of the Half Lives of <sup>25</sup>Al and <sup>26</sup>Al
S E Hunt; W M Jones; J L W Churchill; D A Hancock; S E Hunt; Research Laboratory, Associated Electrical Industries Ltd., Aldermaston, Berkshire; W M Jones; Research Laboratory, Associated Electrical Industries Ltd., Aldermaston, Berkshire; J L W Churchill; Research Laboratory, Associated Electrical Industries Ltd., Aldermaston, Berkshire; D A Hancock; Research Laboratory, Associated Electrical Industries Ltd., Aldermaston, Berkshire
Журнал:
Proceedings of the Physical Society. Section A
Дата:
1954-05-01
Аннотация:
The energy of the proton beam from an air insulated Van de Graaff generator was measured absolutely by an electrostatic analyser, and the resonant energies for proton capture by <sup>24</sup>Mg and <sup>25</sup>Mg were determined by observing the positron yields. The following resonances were observed:<sup>24</sup>Mg (p, γ)<sup>25</sup>Al 225.5 ± 0.3 and 418.4 ± 0.4 keV of half widths 6.0 ± 1.0 and 2.5 ± 0.5 keV respectively.<sup>25</sup>Mg (p, γ)<sup>26</sup>Al 316.7 ± 0.7, 391.5 ± 0.5, 495.6 ± 0.6, 513.4 ± 0.7 and 530.4 ± 0.7 keV, of half widths 12.0 ± 1.0, 8.0 ± 1.0, 5.0 ± 1.0, 3.0 ± 1.0 and 3.0 ± 1.0 keV respectively.The half lives of the positron decay of <sup>25</sup>Al and <sup>26</sup>Al were measured as 7.62 ± 0.13 and 6.68 ± 0.11 seconds respectively.
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