Determination
of
the astrophysical 14C(n, g)15C
reaction rate by means of the ANC,
M. McCleskey, Cyclotron Institute, Texas A & M University,
College Station, Texas
USA − A new method to determine spectroscopic factors
(SFs) that utilizes
asymptotic normalization coefficients (ANCs) has been tested at
Texas A&M,
using 15C as a test case. The
method would use the ANC to fix the external contribution to a
non-peripheral
reaction which would otherwise be free to vary to unphysical
values in a
traditional approach. The investigation consisted of two parts.
First, the ANC for
the 14C+n
configuration in 15C was determined from the heavy
ion neutron
transfer reaction 13C(14C,15C)12C
and the inverse kinematics reaction d(14C,p)15C.
Both of
these reactions were measured at sufficiently low energy to be
safely
peripheral. Next, a
non-peripheral
reaction 14C(d,p)15C was measured with an
incident
deuteron energy of 60 MeV, and this reaction was used along with
the previously
determined ANC to attempt to find the SF. The ANC was also used to
calculate the
astrophysical neutron direct capture rate for 14C(n,g)15C,
which was compared
with recent direct experimental results.