Can one go about creating excited states of a nucleus without using neutrons? For example, Aluminium 26 exists in a ground state that has a half-life of about 70000 years, and decays by beta particle emission. It can also exist in an excited state that decays with a half-life of about 6.3 seconds (Wikipedia). Unfortunately this emits a positron with the decay, or captures an electron. Is there a beta emitter with these characterisitics?