[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-332373-105":59,"doc-detail-332373-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","solar-particle-event-modeling-for-the-lunar-environment-using-eight-polymers-and-a-female-adult-voxel-model","Solar Particle Event Modeling for the Lunar Environment using Eight Polymers and a Female Adult Voxel Model","","Research models the use of polymeric materials for radiation shielding in a lunar environment by simulating Solar Particle Event (SPE) exposure, primarily protons. The study applies effective dose equivalence to evaluate aluminum spheres fortified with eight candidate polymers, using a Female Adult Voxel Model as the phantom target. OLTARIS simulations based on 3DHZETRN compute dose-versus-areal-density trends for whole body and multiple organs, identifying the most effective polymer for shielding outcomes.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/solar-particle-event-modeling-for-the-lunar-environment-using-eight-polymers-and-a-female-adult-voxel-model/332373/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/solar-particle-event-modeling-for-the-lunar-environment-using-eight-polymers-and-a-female-adult-voxel-model/332373.png","ImageObject",300,407,{"name":92,"@type":93},"Ivy","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-03","2026-09-21",true,{"@type":102,"interactionType":103,"userInteractionCount":29},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What problem does the research address for astronauts in space?","Question",{"text":112,"@type":113},"The research seeks cost-effective polymeric materials astronauts can make in space for radiation shielding, with the goal of reducing exposure to SPE and related radiation.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How is radiation exposure evaluated in the study?",{"text":117,"@type":113},"It uses effective dose equivalence, HE = ∑ WT HT, and runs simulations in OLTARIS based on the 3D transport code 3DHZETRN with an aluminum sphere plus polymer shield.",{"name":119,"@type":110,"acceptedAnswer":120},"Which polymer shows the best shielding performance and what does it imply?",{"text":121,"@type":113},"Styrene Butadiene copolymer is identified as the most suitable polymer for best shielding effects in the whole body and three organs, while polydimethylsiloxane performed well for GCR in prior free-space work.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},332373,1790194721,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":29,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":52,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144,"preview_page_count":4},549758252649,"https://ap-avatar.wpscdn.com/avatar/8000253669c5317157?_k=1778319167496531819","Solar Particle Event Modeling for the Lunar Environment using Eight Polymers and a Female Adult Voxel Model  \nOlivia M. Penrose,  Dawn Denise Harris, and Carl E. Bonner, Jr. Norfolk State University, Norfolk, Virginia 23504  \nand  \nSheila A. Thibeault, Keith L. Gordon, and Jin Ho Kang NASA Langley Research Center, Hampton, Virginia 23681  \nAmerican Chemical Society (ACS) Fall 2025 Meeting Washington, DC, August 17-21, 2025  \nChallenge/Objectives  \n􀀡 The challenge of this research is to find cost-effective polymeric materials that the astronauts can make in space for radiation shielding materials.  \n􀀡Reducing the astronauts’ exposure to radiation has always been a NASA priority whether it be SPE (Solar Particle Events) or GCR (Galactic Cosmic Radiation) .  \n􀀡 There have been many kinds of materials used in space for shielding purposes, but NASA is always looking for better materials to increase shielding and reduce radiation exposure.  \n2  \nApproach  \n􀀡 Effective Dose Equivalence: HE = ∑ WT HT , where  \nWT = weighting factor, HT = dose equivalence to organ/tissue.  \n􀀡 The OLTARIS (On-Line Tool for the Assessment of Radiation In Space) computer program, based on the 3-dimensional high-charge and high-energy transport computer program 3DHZETRN, is used to simulate an aluminum sphere fortified by a polymer shield to protect the astronauts inside from SPE radiation (mainly protons) .  \n􀀡 The phantom target used was a Female Adult Voxel Model.  \n􀀡 This simulation will determine which polymer type is the most effective at shielding SPE radiation .  \n3  \nEffective Dose Equivalence vs. Areal Density  \nfor Whole Body  \n500  \n5  \n\n|  | Aluminum |  P |  |  | olyarylamide |  Polyf |  | luroethylene Propylene |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| \u003Cbr>\u003Cbr>|  Poly(Aryl) Ether Ketone\u003Cbr> Polyvinyl Chloride (Unpla\u003Cbr>| sticized) |  |  P\u003Cbr> S | olydimethylsiloxa ne\u003Cbr>tyre ne Butadiene Co-Polym | er |  Polyi\u003Cbr> Polyt | mide\u003Cbr>riethylene Glycol Divinyl |\n|  | \u003Cbr>\u003Cbr>|  | \u003Cbr>|  | \u003Cbr>\u003Cbr>|  |  | \u003Cbr>\u003Cbr>|\n\nEther  \n0 20 40 60 80 100 120  \nAreal Density  \n(g/cm2)  \n4  \nEffective Dose Equivalence vs. Areal Density  \nfor Brain  \nEffective Dose Equivalence  \n(mSv)  \n500.00  \n50.00  \n5.00  \n\n| | Aluminum |  Po | lya cry lamide |  Poly(A |  | ryl) Ether Ketone |\n| --- | --- | --- | --- | --- | --- | --- |\n| \u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>| Polydimethylsiloxa ne Polytriethylene Glycol Di\u003Cbr>|  Po\u003Cbr>vinyl Ether  Po\u003Cbr>| lyfluroethylene Propylene lyvinyl Chloride (Unplastic | ized) |  Polyim\u003Cbr> Styrene | ide\u003Cbr>Butadiene Coploymer |\n|  |  | \u003Cbr>\u003Cbr>| \u003Cbr>|  | \u003Cbr>|  |\n\n0 20 40 60 80 100 120  \nAreal Density  \n(g/cm2)  \n5  \nEffective Dose Equivalence vs. Areal Density  \nfor Blood Forming Organs  \nPoly(Aryl) Ether Ketone  \n Polyimide  \nStyrene Butadiene Copolymer  \n0 20 40 60 80 100 120  \nAreal Density (g/cm2)  \n6  \nAluminum Polya cry lamide  \nPolydimethylsiloxa ne Polyfluroethylene Propylene  \nPolytriethylene Glycol Divinyl Ether Polyvinyl Chloride (Unplasticized)  \nEffective Dose Equivalence vs. Areal Density  \nfor Retina  \n5000  \n500  \n50  \n5 0 20 40 60 80 100  \nAreal Density  \n(g/cm2)  \n120  \n7  \n\n|  | Aluminum\u003Cbr> Polydimethylsiloxan | e  | Polya cry lamide\u003Cbr>Polyfluroethylene Propyl |  Poly(\u003Cbr>ene  Polyi | Aryl) Ether Ketone\u003Cbr>mide |\n| --- | --- | --- | --- | --- | --- |\n| \u003Cbr>\u003Cbr>|  Polytriethylene Glyc\u003Cbr>| ol Divinyl Ether  | Polyvinyl Chloride (Unpla | sticized)  Styre | ne Butadiene Copolymer |\n|  | | \u003Cbr>| |  | |\n\nEffective Dose Equivalence  \n(mSv)  \nDiscussion/Outcomes  \n􀀡Styrene Butadiene copolymer was the most suitable polymer for best shielding effects in whole body and 3 organs .  \n􀀡Polydimethylsiloxane was a good shield for Galactic Cosmic Radiation (GCR) in free space in our previous work.  \n8  \n\n| \u003Cbr>Next Steps/Outlook/Future Work\u003Cbr>Moon (Lunar)\u003Cbr>• Lunar atmosphere has protons, SPE, and GCR (though not as much as compared with Mars) .\u003Cbr>• SPEs and particles come from corona of Sun .\u003Cbr>• Moon is 93 million miles from S","cbCaikQolodCXpsH","https://ap.wps.com/l/cbCaikQolodCXpsH","pdf",262587,"English","# Challenge/Objectives\n# Approach\n## Effective Dose Equivalence vs. Areal Density for Whole Body\n## Effective Dose Equivalence vs. Areal Density for Brain\n## Effective Dose Equivalence vs. Areal Density for Blood Forming Organs\n## Effective Dose Equivalence vs. Areal Density for Retina\n# Discussion/Outcomes\n# Next Steps/Outlook/Future Work\n# Acknowledgements","[{\"question\":\"What problem does the research address for astronauts in space?\",\"answer\":\"The research seeks cost-effective polymeric materials astronauts can make in space for radiation shielding, with the goal of reducing exposure to SPE and related radiation.\"},{\"question\":\"How is radiation exposure evaluated in the study?\",\"answer\":\"It uses effective dose equivalence, HE = ∑ WT HT, and runs simulations in OLTARIS based on the 3D transport code 3DHZETRN with an aluminum sphere plus polymer shield.\"},{\"question\":\"Which polymer shows the best shielding performance and what does it imply?\",\"answer\":\"Styrene Butadiene copolymer is identified as the most suitable polymer for best shielding effects in the whole body and three organs, while polydimethylsiloxane performed well for GCR in prior free-space work.\"}]","Solar Particle Event Modeling for the Lunar Environment using Eight Polymers and a Female Adult Voxel Model | PDF",1789997892,25]