New measurements of the mass and energy levels of²²F

Experimental study of the effective nucleon-nucleon interaction using the F21(d,p)F22

“…2 together with states examined in previous works (upper panel) [18]. The 4 + ground state and the 3 + 0.072-MeV doublet could not be separated, and no significant strength was observed at 300 keV, the location of a state observed in a chargeexchange reaction [20]. Excited states at 0.71(2), 1.63(1), 2.01(1) MeV were resolved in the spectrum, and they correspond to previously observed levels at E * = 0.709, 1.628/1.633, and 2.007 MeV having J π = 2 + , 1 + /3 + and 2 + , respectively.…”

“…Similarly, spin-parity assignments of 1 + were made to the states at 1.63 and 2.572 MeV in 22 F based on the β-decay study of ground state of 22 O [24]. An electromagnetic transition study using the fusionevaporation reaction 9 Be( 14 C,p) and γ-ray detection [25] found a doublet of states at 1.628 and 1.633 MeV which clarified the apparent controversial results of the previous measurements [20,21,24]. A number of excited levels up to E x ≈ 3.6 MeV were also observed and a number of suggested spin assignments were made, including J π = 2 + for the 2.007 MeV state.…”

“…2 [18]. 22 F has been investigated through charge-changing reactions on 22 Ne including (n,p) [19], (t, 3 He) [20,21], and ( 7 Li, 7 Be) [22]. Relevant to the present work are the states with excitation energies of E x = 0.071, 0.709, 1.414 and 1.63-MeV which have been assigned as J π = 3 + , (2, 3 + ), 5 + and 3 + , respectively, as well as a number of levels with ill-defined spins between E x ≈ 2.5 − 5.5 MeV.…”

Beta decay of22O

“…During the past decade, studies of 28Na, 3~ and 34Si have been made in order to determine the masses, half-lives and spectroscopic properties of these nuclei. The energy level scheme of 22F, first studied by Stokes et al F4], has been recently reinvestigated [5,6] to improve and extend the data. A special interest in these cases is that predictions of total half-lives and decay probabilities to individual daughter states are available [3].…”

Development of a secondary triton beam from primary 16,18O beams for (t,3He) experiments at intermediate energies

“…(t,3 He) experiments with primary triton beams have been performed at lower energies: E t ¼ 5:727:8 MeV=nucleon at the Los Alamos Van de Graaff accelerator[13][14][15], E t % 12 MeV=nucleon at the Daresbury Tandem Van de Graaff accelerator[16,17] and E t ¼ 40 MeV=nucleon at the Kernfysisch Versneller Instituut in Groningen[18,19].…”