Notice: Payments for answers will end 4/10/2017. Click for more info.
You have new items in your feed. Click to view.
Question and answer
Q: How many neutrons are in Cesium-130 (Cs)? A.55 B.75 C.130 D.185
A: Cross sections for formation of cesium and rubidium isotopes produced by bombardment of uranium with protons ranging in energy from 0.1 to 6.2 Bev were measured both radiochemically and mass spectrometrically. [ Independent yields were determined for Rb/sup 84/, Rb/sup 86/, Cs/sup 127/, Sc, su p 129/. Cs/sup 130/, Cs/sup 131/, Cs/sup 132/, Cs/sup 134/, Cs/sup 136/, and, at some e nergies, Rb/sup
83 and Cs/sup 135/. In addition, the independent yield of Ba/sup 131/ and the chain yields of Cs/sup 125/, Cs/sup 127/, Cs/sup 129/, La/sup 131/, Cs/sup 135/, Cs/sup 137/, ion cross sections of the Cs and Ba products on the neutron- excess side of stability decrease monotonically with increasing energy above 0.1 Bev, whereas the excitation functions for independent formation of the more neutron-deficient products in the Cs-Ba region and of Rb/sup 84/ and Rb/sup 86/ all go through maxima. The proton energies at which these maxima occur fall on a smooth curve when plotted against the neutronproton ratio of the product, with the peaks moving to higher energies with decreasing neutron-proton ratio. Under the assumption that the mass-yield curve in the region 125 < A < 140 is rather flat at each proton energy, the crosssection data in the Cs region can be used to deduce the charge dispersion in this mass range. Plots of log sigma vs N/Z (or Z--Z/sub A/) show symmetrical bell-shaped peaks up to a bombarding energy of 0.38 Bev, with full width at halfmaximum increasing from 3.3 Z units at 0.10 Bev to about 5 Z units at 0.38 Bev, and with the peak position (Z/sub p/) moving from Z/ sub A/ -- 1.44 to Z/sub A/ -- 0.85 over the same energy range. At all higher energies, a double-peaked charge distribution was found, with a neutron-excess peak centered at N/Z approximates 1,515(Z/sub p/ approximates Z/sub A/ -- 1.9), and having approximately constant width and height at bombarding energies greater than 1 Bev. The peak on the neutron-deficient side which first becomes noticeable at 0.68 Bev appears to become broader and shift slightiy to smaller N/ Z values with increasing energy, The two peaks are of comparable height in the Bev region, and the peak-to-valley ratio is only approximates 2. ]
Expert answered|plain_whyt|Points 2301|
Question
Asked 8/30/2011 6:03:12 PM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
25,770,271 questions answered
Popular Conversations
To derive energy from food, you must eat foods that contain ...
Weegy: To derive energy from food, you must eat foods that contain carbohydrates, proteins, and fats. User: Which of ...
6/16/2017 2:08:12 PM| 1 Answers
Which of the following would be considered a negative side effect of ...
Weegy: Threats of dangerous flooding would be considered a negative side effect of settling near a river bed.
6/23/2017 11:35:22 AM| 0 Answers
The evolution of agricultural practices ultimately led to the ...
Weegy: The evolution of agricultural practices ultimately led to the development of towns and cities.
6/23/2017 10:56:18 AM| 0 Answers
Most scientists and anthropologists agree that early humans first ...
Weegy: Most scientists and anthropologists agree that early humans first emerged in AFRICA.
6/23/2017 10:53:42 AM| 0 Answers
A paragraph that has its topic sentence first is _____. a rectangle ...
Weegy: A paragraph that has its topic sentence first is an inverted triangle.
6/23/2017 10:25:31 AM| 0 Answers
Desert plants are often widely spaced due to competition for ...
Weegy: Desert plants are often widely spaced due to competition for rainwater. TRUE.
6/23/2017 10:16:15 AM| 0 Answers
Total equilibrium in the human body is ...
Weegy: Total equilibrium in the human body is called homeostasis.
6/23/2017 10:08:32 AM| 0 Answers
Weegy Stuff
S
L
Points 30 [Total 1371] Ratings 0 Comments 0 Invitations 3 Offline
S
Points 17 [Total 17] Ratings 0 Comments 7 Invitations 1 Offline
S
Points 10 [Total 10] Ratings 0 Comments 0 Invitations 1 Offline
S
Points 10 [Total 10] Ratings 1 Comments 0 Invitations 0 Offline
S
R
Points 3 [Total 19] Ratings 0 Comments 3 Invitations 0 Offline
S
Points 3 [Total 3] Ratings 0 Comments 3 Invitations 0 Offline
S
Points 2 [Total 2] Ratings 0 Comments 2 Invitations 0 Offline
S
Points 2 [Total 72] Ratings 0 Comments 2 Invitations 0 Offline
S
Points 1 [Total 1] Ratings 0 Comments 1 Invitations 0 Offline
S
Points 1 [Total 1] Ratings 0 Comments 1 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.