“Whoa! It’s like Spotify but for academic articles.”

Instant Access to Thousands of Journals for just $40/month

Cosmic-Ray Bursts in an Unshielded Chamber and Under One Inch of Lead at Different Altitudes

A Classical Model for the Nucleus J. G. WINANS University of Wisconsin, Madison, Wisconsin December 26, 1946 W HEN the cube root of the mass number iU plotted against the square root of the atomic number for the most abundant or longest lived isotope of the elements, there is obtained a very nearly straight line extending from the neutron to curium. Hydrogen and helium are the only elements appreciably off of the line. The equation is MI-1.15=0.528Zi. To show this more accurately, (Ml - 1.15)2 is plotted against the atomic number in Fig. 1. Assuming nuclei spherical, made of protons and neutrons each of radius ro, with the protons confined to the outside giving a constant surface charge density at a depth xro below the surface, we have: 47r(r-xro)2 = KlZ7rro2 and 4/3xrr3 = K2M4/3srrol, where M is the mass number and Z is the atomic number. Combining gives MK2i 2K2' Use of K2=1.35 as for spherical close packing gives x= 1.28, and K, = 1.36. The correction factor for K, to get a value of K, corresponding to the middle of the surface particles, depends on M and Z. For holmium, for example, M=165, Z=67, and the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review American Physical Society (APS)

Loading next page...

Sorry, we don’t have permission to share this article on DeepDyve,
but here are related articles that you can start reading right now:

Explore the DeepDyve Library

How DeepDyve Works

Spend time researching, not time worrying you’re buying articles that might not be useful.

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from Springer, Elsevier, Nature, IEEE, Wiley-Blackwell and more.

All the latest content is available, no embargo periods.

See the journals in your area

Simple and Affordable Pricing

14-day free trial. Cancel anytime, with a 30-day money-back guarantee.

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Best Deal — 25% off

Annual Plan

  • All the features of the Professional Plan, but for 25% off!
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

billed annually