EXFOR O2632
last update: 2025-11-26
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0. OVERALL DESCRIPTION (O2632.001)
last update: 2025-11-26
Title

Elastic scattering of 8He+4He and two-neutron transfer and the influence of resonances in 12Be

Author
M.Freer, N.I.Ashwood, N.L.Achouri, W.N.Catford, N.Curtis, F.Delaunay, H.Al Falou, F.M.Marques, T.Munoz-Britton, N.A.Orr, R.Raabe, N.Soic, J.S.Thomas, C.Wheldon, V.A.Ziman
Institute
Univ. of Birmingham, England
Universite de Caen
Univ. of Surrey, Guildford
Grand Accelerateur National d'Ions Lourds, Caen
Inst.Rudjer Boskovic, Zagreb
Reference
Phys.Lett.B 775 (2017) 58
Facility
Cyclotron of Grand Accelerateur National d'Ions Lourds, Caen

SPIRAL facility

Sample

A high-purity 4He gas target was used in the ECLAN reaction chamber at pressures of 1000-1400 mbar.

Detector
Counter telescope, Silicon detector, Silicon detector, Silicon detector

A silicon monitor detector (2 cm dia.) was placed between the two lampshade detector arrays to measure integrated number of beam particles.

Silicon detector

Two arrays of segmented silicon detectors (YY1 type, 500 um thick) were used. Each array consisted of six detectors in a lampshade configuration. The two arrays, Lamp1 and Lamp2, were placed at distances of 15 cm and 25.5 cm from the entrance window. The detectors were inclined at 46 degree to the beam axis and covered angular ranges of 13-39 degree (Lamp1) and 7.5-21 degree (Lamp2).

Error analysis
Heading Lower limit (%) Upper limit (%) Correlation Remark
ERR-S Statistical uncertainty
History
Date Work Remark
2025-11-22 Data received at the data center Data received from M.Freer (2025-11-22)
2025-11-26 Compiled at the data center VT
1. DATA TABLE O2632.002
last update: 2025-11-26
Quantity given
4He(8He,el)4He angular distribution of particle specified (alias: 8He(α,el)8He angular distribution of particle specified )
Status
Data presented by authors (Ref. M.Freer et al., Phys.Lett.B 775 (2017) 58)

Fig.5

Data table (only first and last 5 data points are shown) 
------------------------------------------------------------
E-EXC-CMP   E-EXC-CMP   ANG-CM      DATA        ERR-S       
MEV         MEV         ADEG        MB/SR       MB/SR       
------------------------------------------------------------
       14.3        15.0         62. 110.9066746 2.758906647 
       14.3        15.0         63. 98.90648918 2.386234973 
       14.3        15.0         64. 83.86619605 2.061521868 
       14.3        15.0         65. 69.46554952 1.786461166 
       14.3        15.0         66. 56.77424046 1.542914998 
 ..........  ..........  ..........  ..........  .......... 
       15.9        16.4        129. 3.085264616 0.405115091 
       15.9        16.4        130. 2.811098807 0.397549406 
       15.9        16.4        131. 3.956959755 0.502534391 
       15.9        16.4        132. 4.385763725 0.570977803 
       15.9        16.4        133. 6.158332118 0.769791515 
------------------------------------------------------------
2. DATA TABLE O2632.003
last update: 2025-11-26
Quantity given
4He(8He,x)6He differential c/s with respect to angle
Status
Data presented by authors (Ref. M.Freer et al., Phys.Lett.B 775 (2017) 58)

Fig.6

Data table (only first and last 5 data points are shown) 
------------------------------------------------
E-EXC-CMP   ANG-CM      DATA        ERR-S       
MEV         ADEG        MB/SR       MB/SR       
------------------------------------------------
       14.4         63. 5.145831612 1.212884143 
       14.4         64. 2.237711986 0.745903995 
       14.4         65.  5.48871263 1.076425108 
       14.4         66. 4.481195517 0.878834746 
       14.4         67. 5.334523471 0.865373979 
 ..........  ..........  ..........  .......... 
       16.0        118.  3.03510161 0.607020322 
       16.0        119. 3.235796981 0.660504293 
       16.0        120. 2.533530522 0.597158871 
       16.0        121. 1.515234697 0.479159283 
       16.0        122. 2.217885432 0.592754815 
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