  In the present work considering the contributions of the daughter nuclear
charge and the orbital angular momentum taken away by the emitted proton, we
propose a two-parameter formula of new Geiger-Nuttall law for proton
radioactivity. A set of universal parameters of this law is obtained by fitting
44 experimental data of proton emitters in the ground state and isomeric state.
The calculated results can reproduce the experimental data well. For a
comparison, the calculations performed using other theoretical methods, such as
UDLP proposed by Qi, et al.
[https://journals.aps.org/prc/abstract/10.1103/PhysRevC.85.011303], the
CPPM-Guo2013 analyzed by our previous work [Deng, et al.,
https://link.springer.com/article/10.1140/epja/i2019-12728-0] and the modified
Gamow-like model proposed by us [Chen, et al.,
https://iopscience.iop.org/article/10.1088/1361-6471/ab1a56] are also included.
Meanwhile, we extend this new Geiger-Nuttall law to predict the proton
radioactivity half-lives for $51 \leq Z \leq 91$ nuclei, whose proton
radioactivity is energetically allowed or observed but not yet quantified in
NUBASE2016.
