ENTRY A0243 20220331 A100A024300000001 SUBENT A0243001 20220331 A100A024300100001 BIB 13 32 A024300100002 TITLE Cross-section measurements for the 75As(alpha,2n)77Br A024300100003 reaction A024300100004 AUTHOR (S.L.Waters,A.D.Nunn,M.L.Thakur) A024300100005 REFERENCE (J,JIN,35,3413,1973) A024300100006 INSTITUTE (2UK UK). Medical Research Council Cyclotron unit, A024300100007 Hammersmith Hospital, London W-12 OHS. A024300100008 FACILITY (CYCLO,2UK HHL) 'MRC' cyclotron -4-He-beam A024300100009 DETECTOR (GELI) 15 cm**3. A024300100010 METHOD (SITA,ACTIV,EDEG) A024300100011 MONITOR (29-CU-63(A,X)30-ZN-65,,SIG) A024300100012 MONIT-REF (B0154004,E.Lebowitz+,J,ARI,21,625,1970) A024300100013 REL-REF (I,,I.A.Watson+,J,NIM,106,231,1973) The device for A024300100014 target irradiation. A024300100015 SAMPLE Arsine is liberated from a warm mixture of arsenic A024300100016 pentoxide, zinc powder and sulphuric acid. It is A024300100017 flushed towards two tungsten electrodes with oxygen- A024300100018 free nitrogen. When a discharge (from a Tesla vacuum A024300100019 tester) is passed through the electrodes, arsenic is A024300100020 deposited onto an aluminium plancha positioned to A024300100021 catch it. A024300100022 Target made is this way had weight of approximately A024300100023 0.7 mg of arsenic distributed uniformly over an A024300100024 area about 2 cm**2. A024300100025 ERR-ANALYS (DATA-ERR) Standard deviation of the mean of cross- A024300100026 section for nine identical targets bombarded with A024300100027 'He' ions of the same incident energy and the A024300100028 random error obtained in atomic absorption A024300100029 estimation of the arsenic content. A024300100030 HISTORY (19850327C) A024300100031 (19850331U) A024300100032 (20220331A) SD:Updated to new date formats,lower case. A024300100033 Corrections in all Subents. ERR-T -> DATA-ERR. A024300100034 ENDBIB 32 0 A024300100035 NOCOMMON 0 0 A024300100036 ENDSUBENT 35 0 A024300199999 SUBENT A0243002 20220331 A100A024300200001 BIB 6 19 A024300200002 REACTION (33-AS-75(A,2N)35-BR-77,,SIG) A024300200003 ADD-RES The upper limits of 76-Br and 76-As production cross A024300200004 sections are less 25 mb at 28.1 MeV using analytical A024300200005 method. A024300200006 REL-REF (M,,D.K.Bewley+,J,PMB,12,1,1967) A024300200007 (M,,C.F.Williamson+,R,CEA-R-3042,1962) Incident beam A024300200008 energy estimated from experimental data of Bewley et A024300200009 al., and the range energy compilation of Williamson. A024300200010 (R,,D.C.Sarantites+,J,PR,177,1631,1969) Decay data. A024300200011 COMMENT /By compiler/ Since q-value for (alpha,2n) reaction on A024300200012 As-75 is -14.2 MeV the results at 13.8 MeV appear A024300200013 to be in error. However, the energy spread may provide A024300200014 enough of an overlap with high cross sections region A024300200015 to produce this apparent anomaly. A024300200016 /By authors/ To explain this fact the energy scale A024300200017 should be shifted by about 0.5 MeV. A024300200018 STATUS (TABLE) Tbl. 1 from J.Inorg.Nucl.Chem.,35(1973)3413 A024300200019 HISTORY (20220331A) SD: SF5=IND and SF9=EXP deleted from A024300200020 REACTION code. STATUS added. ERR-T -> DATA-ERR. A024300200021 ENDBIB 19 0 A024300200022 NOCOMMON 0 0 A024300200023 DATA 3 13 A024300200024 EN DATA DATA-ERR A024300200025 MEV MB MB A024300200026 28.1 670. 101. A024300200027 27.8 644. 96.6 A024300200028 27.4 706. 106. A024300200029 26.3 803. 120. A024300200030 25.1 721. 108. A024300200031 23.9 638. 95.6 A024300200032 22.7 798. 120. A024300200033 21.4 651. 97.6 A024300200034 20.1 550. 82.5 A024300200035 18.6 506. 75.9 A024300200036 17.1 427. 64.0 A024300200037 15.5 321. 48.2 A024300200038 13.8 80.3 12.0 A024300200039 ENDDATA 15 0 A024300200040 ENDSUBENT 39 0 A024300299999 ENDENTRY 2 0 A024399999999