ENTRY C2841 20221025 C224C2841000 1 SUBENT C2841001 20221025 C224C2841001 1 BIB 10 35 C2841001 2 TITLE Two Radioactive Substances from Magnesium after C2841001 3 Deuteron Bombardment C2841001 4 AUTHOR (M.C.Henderson) C2841001 5 REFERENCE (J,PR,48,855,1935) C2841001 6 #doi:10.1103/PhysRev.48.855 C2841001 7 INSTITUTE (1USABRK) C2841001 8 FACILITY (CYCLO,1USABRK) The large cyclotron in the Radiation C2841001 9 Laboratory. C2841001 10 SAMPLE The target was in all cases a piece of magnesium C2841001 11 ribbon of 99.97% purity. C2841001 12 DETECTOR (IOCH) C2841001 13 METHOD (ACTIV) A thick target of magnesium was bombarded in C2841001 14 air for about 10 minutes by an ion beam of 3 MeV C2841001 15 energy and about 0.9 microampere intensity. At the C2841001 16 end of the exposure the target was at once placed at C2841001 17 the window of the electroscope. The measured activity, C2841001 18 as a function of time, was plotted on a logarithmic C2841001 19 scale. The half-life determined from the linear C2841001 20 portion, after due allowance for the natural leak and C2841001 21 background activity of longer life. Several runs were C2841001 22 made to determine the transmutation functions by C2841001 23 using the now standard method of exposing a pile of C2841001 24 thin magnesium foils to the action of the deuteron C2841001 25 beam and then separating the foils and measuring C2841001 26 their activity separately. C2841001 27 ANALYSIS The variation in the yield of transmutations as a C2841001 28 function of the energy of the incident particle has C2841001 29 been called the excitation function, or more properly C2841001 30 the voltage transmutation function. The Gamow formula C2841001 31 for the variation in number of transmutation, N, with C2841001 32 voltage, V, is the following: N=k*V**(-1)*exp(-S) C2841001 33 where k is a constant of proportionality and S is C2841001 34 calculated using kinematic parameters and binding C2841001 35 energies. C2841001 36 HISTORY (20221025C) BP C2841001 37 ENDBIB 35 0 C2841001 38 NOCOMMON 0 0 C2841001 39 ENDSUBENT 38 0 C284100199999 SUBENT C2841002 20221025 C224C2841002 1 BIB 4 6 C2841002 2 REACTION (12-MG-0(D,X)11-NA-24,,SIG) C2841002 3 REL-REF (A,C2836003,J.W.Irvine+,J,JCP,16,686,1948) C2841002 4 DECAY-DATA (11-NA-24,15.8HR) Measured by authors. C2841002 5 STATUS (CURVE) Fig. 1, page 688 of J,JCP,16,686,1948. The dataC2841002 6 are taken as cited by Irvine et al., not from originalC2841002 7 publication. C2841002 8 ENDBIB 6 0 C2841002 9 NOCOMMON 0 0 C2841002 10 DATA 2 14 C2841002 11 EN DATA C2841002 12 MEV B C2841002 13 1.561 2.365E-04 C2841002 14 1.657 2.876E-04 C2841002 15 1.780 3.906E-04 C2841002 16 2.137 1.428E-03 C2841002 17 2.192 1.219E-03 C2841002 18 2.590 4.232E-03 C2841002 19 2.617 3.972E-03 C2841002 20 2.713 4.959E-03 C2841002 21 2.947 1.047E-02 C2841002 22 2.960 8.129E-03 C2841002 23 3.166 1.229E-02 C2841002 24 3.248 1.692E-02 C2841002 25 3.276 1.255E-02 C2841002 26 3.564 1.754E-02 C2841002 27 ENDDATA 16 0 C2841002 28 ENDSUBENT 27 0 C284100299999 SUBENT C2841003 20221025 C224C2841003 1 BIB 3 3 C2841003 2 REACTION (12-MG-26(D,X)12-MG-27,,SIG) C2841003 3 DECAY-DATA (12-MG-27,10.5MIN) Measured by authors. C2841003 4 STATUS (TABLE) page 861 of J,PR,48,855,1935. C2841003 5 ENDBIB 3 0 C2841003 6 NOCOMMON 0 0 C2841003 7 DATA 2 1 C2841003 8 EN DATA C2841003 9 MEV B C2841003 10 3.0 2.4E-2 C2841003 11 ENDDATA 3 0 C2841003 12 ENDSUBENT 11 0 C284100399999 SUBENT C2841004 20221025 C224C2841004 1 BIB 3 3 C2841004 2 REACTION (12-MG-26(D,X)12-MG-27,,PY,,TT) C2841004 3 DECAY-DATA (12-MG-27,10.5MIN) Measured by authors. C2841004 4 STATUS (TABLE) page 860 of J,PR,48,855,1935. C2841004 5 ENDBIB 3 0 C2841004 6 NOCOMMON 0 0 C2841004 7 DATA 2 1 C2841004 8 EN DATA C2841004 9 MEV PRD/INC C2841004 10 3.0 5.0E-7 C2841004 11 ENDDATA 3 0 C2841004 12 ENDSUBENT 11 0 C284100499999 ENDENTRY 4 0 C284199999999