Indirect methods for astrophysical reaction rates

نویسندگان

  • F. M. Nunes
  • P. Mohr
  • N. C. Summers
چکیده

Capture reactions can be a technical challenge in the energy region of astrophysical interest. Alternative experimental techniques were developed making use of beams available at higher energies. Although they have been widely applied, these indirect methods have long called for theoretical validation. In this work we discuss the use of transfer and breakup reactions as astrophysical tools. We discuss the models used to analyze these reactions and the level of accuracy that can be obtained in the capture cross section. We also consider the various sources of uncertainties that need to be under control.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Indirect Techniques in Nuclear Astrophysics: Asymptotic Normalization Coefficients and the Trojan Horse Method

Both direct and indirect techniques have been used for many years to determine nuclear reaction rates at astrophysical energies. A number of problems have been encountered which limit measurements by direct techniques, including very low cross sections, the importance of subthreshold states and the need for radioactive targets. Over the past decade, new indirect techniques have been developed t...

متن کامل

Complete inclusion of parity-dependent level densities in the statistical description of astrophysical reaction rates

Microscopic calculations show a strong parity dependence of the nuclear level density at low excitation energy of a nucleus. Previously, this dependence has either been neglected or only implemented in the initial and final channels of Hauser-Feshbach calculations. We present an indirect way to account for a full parity dependence in all steps of a reaction, including the one of the compound nu...

متن کامل

Breakup of loosely bound nuclei as indirect method in nuclear astrophysics : 8 B , 9 C , 23

Breakup of loosely bound nuclei as indirect method in nuclear astrophysics: Abstract. We discuss the use of one-nucleon breakup reactions of loosely bound nuclei at intermediate energies as an indirect method in nuclear astrophysics. These are peripheral processes, therefore we can extract asymptotic normalization coefficients (ANC) from which reaction rates of astrophysical interest can be inf...

متن کامل

Challenges in nucleosynthesis of trans-iron elements

Nucleosynthesis beyond Fe poses additional challenges not encountered when studying astrophysical processes involving light nuclei. Astrophysical sites and conditions are not well known for some of the processes involved. On the nuclear physics side, different approaches are required, both in theory and experiment. The main differences and most important considerations are presented for a selec...

متن کامل

Nuclear Astrophysics with Radioactive Nuclear Beams: Indirect Methods

The review describes a number of indirect methods in nuclear astrophysics using radioactive beams: Coulomb dissociation, transfer reactions (the ANC method), breakup of loosely bound nuclei at intermediate energies, the use other spectroscopic measurements, including -decay studies and the determination of resonance parameters. The examples chosen are drawn from the experiments the author was i...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008